Make ActionView frozen string literal friendly.

Plus a couple of related ActionPack patches.

Make ActionView frozen string literal friendly.
Plus a couple of related ActionPack patches.
3d453b40 · Pat Allan · dd491b24 · 3d453b40 · 3d453b40 · 3d453b40
22 changed file
--- a/actionpack/lib/action_controller/log_subscriber.rb
+++ b/actionpack/lib/action_controller/log_subscriber.rb
@@ -24,7 +24,7 @@ def process_action(event)
          exception_class_name = payload[:exception].first
          status = ActionDispatch::ExceptionWrapper.status_code_for_exception(exception_class_name)
        end
-        message = "Completed #{status} #{Rack::Utils::HTTP_STATUS_CODES[status]} in #{event.duration.round}ms"
+        message = "Completed #{status} #{Rack::Utils::HTTP_STATUS_CODES[status]} in #{event.duration.round}ms".dup
        message << " (#{additions.join(" | ".freeze)})" unless additions.empty?
        message << "\n\n" if defined?(Rails.env) && Rails.env.development?


--- a/actionpack/lib/action_dispatch/journey/router/utils.rb
+++ b/actionpack/lib/action_dispatch/journey/router/utils.rb
@@ -18,7 +18,7 @@ def self.normalize_path(path)
          path.squeeze!("/".freeze)
          path.sub!(%r{/+\Z}, "".freeze)
          path.gsub!(/(%[a-f0-9]{2})/) { $1.upcase }
-          path = "/" if path == "".freeze
+          path = "/".dup if path == "".freeze
          path.force_encoding(encoding)
          path
        end

--- a/actionpack/lib/action_dispatch/testing/assertions/response.rb
+++ b/actionpack/lib/action_dispatch/testing/assertions/response.rb
@@ -79,7 +79,7 @@ def normalize_argument_to_redirection(fragment)
        def generate_response_message(expected, actual = @response.response_code)
          "Expected response to be a <#{code_with_name(expected)}>,"\
          " but was a <#{code_with_name(actual)}>"
-            .concat(location_if_redirected).concat(response_body_if_short)
+            .dup.concat(location_if_redirected).concat(response_body_if_short)
        end

        def response_body_if_short

--- a/actionview/lib/action_view/helpers/date_helper.rb
+++ b/actionview/lib/action_view/helpers/date_helper.rb
@@ -1007,7 +1007,7 @@ def build_select(type, select_options_as_html)
          select_options[:disabled] = "disabled" if @options[:disabled]
          select_options[:class] = css_class_attribute(type, select_options[:class], @options[:with_css_classes]) if @options[:with_css_classes]

-          select_html = "\n"
+          select_html = "\n".dup
          select_html << content_tag("option".freeze, "", value: "") + "\n" if @options[:include_blank]
          select_html << prompt_option_tag(type, @options[:prompt]) + "\n" if @options[:prompt]
          select_html << select_options_as_html
@@ -1089,7 +1089,7 @@ def input_id_from_type(type)
        # Given an ordering of datetime components, create the selection HTML
        # and join them with their appropriate separators.
        def build_selects_from_types(order)
-          select = ""
+          select = "".dup
          first_visible = order.find { |type| !@options[:"discard_#{type}"] }
          order.reverse_each do |type|
            separator = separator(type) unless type == first_visible # don't add before first visible field

--- a/actionview/lib/action_view/helpers/translation_helper.rb
+++ b/actionview/lib/action_view/helpers/translation_helper.rb
@@ -95,7 +95,7 @@ def translate(key, options = {})
          raise e if raise_error

          keys = I18n.normalize_keys(e.locale, e.key, e.options[:scope])
-          title = "translation missing: #{keys.join('.')}"
+          title = "translation missing: #{keys.join('.')}".dup

          interpolations = options.except(:default, :scope)
          if interpolations.any?

--- a/actionview/lib/action_view/log_subscriber.rb
+++ b/actionview/lib/action_view/log_subscriber.rb
@@ -14,7 +14,7 @@ def initialize

    def render_template(event)
      info do
-        message = "  Rendered #{from_rails_root(event.payload[:identifier])}"
+        message = "  Rendered #{from_rails_root(event.payload[:identifier])}".dup
        message << " within #{from_rails_root(event.payload[:layout])}" if event.payload[:layout]
        message << " (#{event.duration.round(1)}ms)"
      end
@@ -22,7 +22,7 @@ def render_template(event)

    def render_partial(event)
      info do
-        message = "  Rendered #{from_rails_root(event.payload[:identifier])}"
+        message = "  Rendered #{from_rails_root(event.payload[:identifier])}".dup
        message << " within #{from_rails_root(event.payload[:layout])}" if event.payload[:layout]
        message << " (#{event.duration.round(1)}ms)"
        message << " #{cache_message(event.payload)}" unless event.payload[:cache_hit].nil?

--- a/actionview/lib/action_view/template.rb
+++ b/actionview/lib/action_view/template.rb
@@ -329,7 +329,7 @@ def locals_code
        locals = locals.grep(/\A@?(?![A-Z0-9])(?:[[:alnum:]_]|[^\0-\177])+\z/)

        # Double assign to suppress the dreaded 'assigned but unused variable' warning
-        locals.each_with_object("") { |key, code| code << "#{key} = #{key} = local_assigns[:#{key}];" }
+        locals.each_with_object("".dup) { |key, code| code << "#{key} = #{key} = local_assigns[:#{key}];" }
      end

      def method_name

--- a/actionview/lib/action_view/test_case.rb
+++ b/actionview/lib/action_view/test_case.rb
@@ -104,7 +104,7 @@ def setup_with_controller
        # empty string ensures buffer has UTF-8 encoding as
        # new without arguments returns ASCII-8BIT encoded buffer like String#new
        @output_buffer = ActiveSupport::SafeBuffer.new ""
-        @rendered = ""
+        @rendered = "".dup

        make_test_case_available_to_view!
        say_no_to_protect_against_forgery!

--- a/actionview/lib/action_view/testing/resolvers.rb
+++ b/actionview/lib/action_view/testing/resolvers.rb
@@ -20,7 +20,7 @@ def to_s
    private

      def query(path, exts, _, _)
-        query = ""
+        query = "".dup
        EXTENSIONS.each_key do |ext|
          query << "(" << exts[ext].map { |e| e && Regexp.escape(".#{e}") }.join("|") << "|)"
        end

--- a/actionview/test/activerecord/form_helper_activerecord_test.rb
+++ b/actionview/test/activerecord/form_helper_activerecord_test.rb
@@ -55,7 +55,7 @@ def test_nested_fields_for_with_child_index_option_override_on_a_nested_attribut
  private

    def hidden_fields(method = nil)
-      txt = %{<input name="utf8" type="hidden" value="&#x2713;" />}
+      txt = %{<input name="utf8" type="hidden" value="&#x2713;" />}.dup

      if method && !%w(get post).include?(method.to_s)
        txt << %{<input name="_method" type="hidden" value="#{method}" />}
@@ -65,7 +65,7 @@ def hidden_fields(method = nil)
    end

    def form_text(action = "/", id = nil, html_class = nil, remote = nil, multipart = nil, method = nil)
-      txt =  %{<form accept-charset="UTF-8" action="#{action}"}
+      txt =  %{<form accept-charset="UTF-8" action="#{action}"}.dup
      txt << %{ enctype="multipart/form-data"} if multipart
      txt << %{ data-remote="true"} if remote
      txt << %{ class="#{html_class}"} if html_class

--- a/actionview/test/fixtures/ruby_template.ruby
+++ b/actionview/test/fixtures/ruby_template.ruby
-body = ""
+body = "".dup
 body << ["Hello", "from", "Ruby", "code"].join(" ")
--- a/actionview/test/template/atom_feed_helper_test.rb
+++ b/actionview/test/template/atom_feed_helper_test.rb
@@ -194,7 +194,7 @@ class ScrollsController < ActionController::Base
  FEEDS["provide_builder"] = <<-'EOT'
          # we pass in the new_xml to the helper so it doesn't
          # call anything on the original builder
-          new_xml = Builder::XmlMarkup.new(:target=>'')
+          new_xml = Builder::XmlMarkup.new(:target=>''.dup)
          atom_feed(:xml => new_xml) do |feed|
            feed.title("My great blog!")
            feed.updated(@scrolls.first.created_at)

--- a/actionview/test/template/date_helper_test.rb
+++ b/actionview/test/template/date_helper_test.rb
@@ -214,7 +214,7 @@ def test_time_ago_in_words
  end

  def test_select_day
-    expected = %(<select id="date_day" name="date[day]">\n)
+    expected = %(<select id="date_day" name="date[day]">\n).dup
    expected << %(<option value="1">1</option>\n<option value="2">2</option>\n<option value="3">3</option>\n<option value="4">4</option>\n<option value="5">5</option>\n<option value="6">6</option>\n<option value="7">7</option>\n<option value="8">8</option>\n<option value="9">9</option>\n<option value="10">10</option>\n<option value="11">11</option>\n<option value="12">12</option>\n<option value="13">13</option>\n<option value="14">14</option>\n<option value="15">15</option>\n<option value="16" selected="selected">16</option>\n<option value="17">17</option>\n<option value="18">18</option>\n<option value="19">19</option>\n<option value="20">20</option>\n<option value="21">21</option>\n<option value="22">22</option>\n<option value="23">23</option>\n<option value="24">24</option>\n<option value="25">25</option>\n<option value="26">26</option>\n<option value="27">27</option>\n<option value="28">28</option>\n<option value="29">29</option>\n<option value="30">30</option>\n<option value="31">31</option>\n)
    expected << "</select>\n"

@@ -223,7 +223,7 @@ def test_select_day
  end

  def test_select_day_with_blank
-    expected = %(<select id="date_day" name="date[day]">\n)
+    expected = %(<select id="date_day" name="date[day]">\n).dup
    expected << %(<option value=""></option>\n<option value="1">1</option>\n<option value="2">2</option>\n<option value="3">3</option>\n<option value="4">4</option>\n<option value="5">5</option>\n<option value="6">6</option>\n<option value="7">7</option>\n<option value="8">8</option>\n<option value="9">9</option>\n<option value="10">10</option>\n<option value="11">11</option>\n<option value="12">12</option>\n<option value="13">13</option>\n<option value="14">14</option>\n<option value="15">15</option>\n<option value="16" selected="selected">16</option>\n<option value="17">17</option>\n<option value="18">18</option>\n<option value="19">19</option>\n<option value="20">20</option>\n<option value="21">21</option>\n<option value="22">22</option>\n<option value="23">23</option>\n<option value="24">24</option>\n<option value="25">25</option>\n<option value="26">26</option>\n<option value="27">27</option>\n<option value="28">28</option>\n<option value="29">29</option>\n<option value="30">30</option>\n<option value="31">31</option>\n)
    expected << "</select>\n"

@@ -232,7 +232,7 @@ def test_select_day_with_blank
  end

  def test_select_day_nil_with_blank
-    expected = %(<select id="date_day" name="date[day]">\n)
+    expected = %(<select id="date_day" name="date[day]">\n).dup
    expected << %(<option value=""></option>\n<option value="1">1</option>\n<option value="2">2</option>\n<option value="3">3</option>\n<option value="4">4</option>\n<option value="5">5</option>\n<option value="6">6</option>\n<option value="7">7</option>\n<option value="8">8</option>\n<option value="9">9</option>\n<option value="10">10</option>\n<option value="11">11</option>\n<option value="12">12</option>\n<option value="13">13</option>\n<option value="14">14</option>\n<option value="15">15</option>\n<option value="16">16</option>\n<option value="17">17</option>\n<option value="18">18</option>\n<option value="19">19</option>\n<option value="20">20</option>\n<option value="21">21</option>\n<option value="22">22</option>\n<option value="23">23</option>\n<option value="24">24</option>\n<option value="25">25</option>\n<option value="26">26</option>\n<option value="27">27</option>\n<option value="28">28</option>\n<option value="29">29</option>\n<option value="30">30</option>\n<option value="31">31</option>\n)
    expected << "</select>\n"

@@ -240,7 +240,7 @@ def test_select_day_nil_with_blank
  end

  def test_select_day_with_two_digit_numbers
-    expected = %(<select id="date_day" name="date[day]">\n)
+    expected = %(<select id="date_day" name="date[day]">\n).dup
    expected << %(<option value="1">01</option>\n<option selected="selected" value="2">02</option>\n<option value="3">03</option>\n<option value="4">04</option>\n<option value="5">05</option>\n<option value="6">06</option>\n<option value="7">07</option>\n<option value="8">08</option>\n<option value="9">09</option>\n<option value="10">10</option>\n<option value="11">11</option>\n<option value="12">12</option>\n<option value="13">13</option>\n<option value="14">14</option>\n<option value="15">15</option>\n<option value="16">16</option>\n<option value="17">17</option>\n<option value="18">18</option>\n<option value="19">19</option>\n<option value="20">20</option>\n<option value="21">21</option>\n<option value="22">22</option>\n<option value="23">23</option>\n<option value="24">24</option>\n<option value="25">25</option>\n<option value="26">26</option>\n<option value="27">27</option>\n<option value="28">28</option>\n<option value="29">29</option>\n<option value="30">30</option>\n<option value="31">31</option>\n)
    expected << "</select>\n"

@@ -249,7 +249,7 @@ def test_select_day_with_two_digit_numbers
  end

  def test_select_day_with_html_options
-    expected = %(<select id="date_day" name="date[day]" class="selector">\n)
+    expected = %(<select id="date_day" name="date[day]" class="selector">\n).dup
    expected << %(<option value="1">1</option>\n<option value="2">2</option>\n<option value="3">3</option>\n<option value="4">4</option>\n<option value="5">5</option>\n<option value="6">6</option>\n<option value="7">7</option>\n<option value="8">8</option>\n<option value="9">9</option>\n<option value="10">10</option>\n<option value="11">11</option>\n<option value="12">12</option>\n<option value="13">13</option>\n<option value="14">14</option>\n<option value="15">15</option>\n<option value="16" selected="selected">16</option>\n<option value="17">17</option>\n<option value="18">18</option>\n<option value="19">19</option>\n<option value="20">20</option>\n<option value="21">21</option>\n<option value="22">22</option>\n<option value="23">23</option>\n<option value="24">24</option>\n<option value="25">25</option>\n<option value="26">26</option>\n<option value="27">27</option>\n<option value="28">28</option>\n<option value="29">29</option>\n<option value="30">30</option>\n<option value="31">31</option>\n)
    expected << "</select>\n"

@@ -258,7 +258,7 @@ def test_select_day_with_html_options
  end

  def test_select_day_with_default_prompt
-    expected = %(<select id="date_day" name="date[day]">\n)
+    expected = %(<select id="date_day" name="date[day]">\n).dup
    expected << %(<option value="">Day</option>\n<option value="1">1</option>\n<option value="2">2</option>\n<option value="3">3</option>\n<option value="4">4</option>\n<option value="5">5</option>\n<option value="6">6</option>\n<option value="7">7</option>\n<option value="8">8</option>\n<option value="9">9</option>\n<option value="10">10</option>\n<option value="11">11</option>\n<option value="12">12</option>\n<option value="13">13</option>\n<option value="14">14</option>\n<option value="15">15</option>\n<option value="16" selected="selected">16</option>\n<option value="17">17</option>\n<option value="18">18</option>\n<option value="19">19</option>\n<option value="20">20</option>\n<option value="21">21</option>\n<option value="22">22</option>\n<option value="23">23</option>\n<option value="24">24</option>\n<option value="25">25</option>\n<option value="26">26</option>\n<option value="27">27</option>\n<option value="28">28</option>\n<option value="29">29</option>\n<option value="30">30</option>\n<option value="31">31</option>\n)
    expected << "</select>\n"

@@ -266,7 +266,7 @@ def test_select_day_with_default_prompt
  end

  def test_select_day_with_custom_prompt
-    expected = %(<select id="date_day" name="date[day]">\n)
+    expected = %(<select id="date_day" name="date[day]">\n).dup
    expected << %(<option value="">Choose day</option>\n<option value="1">1</option>\n<option value="2">2</option>\n<option value="3">3</option>\n<option value="4">4</option>\n<option value="5">5</option>\n<option value="6">6</option>\n<option value="7">7</option>\n<option value="8">8</option>\n<option value="9">9</option>\n<option value="10">10</option>\n<option value="11">11</option>\n<option value="12">12</option>\n<option value="13">13</option>\n<option value="14">14</option>\n<option value="15">15</option>\n<option value="16" selected="selected">16</option>\n<option value="17">17</option>\n<option value="18">18</option>\n<option value="19">19</option>\n<option value="20">20</option>\n<option value="21">21</option>\n<option value="22">22</option>\n<option value="23">23</option>\n<option value="24">24</option>\n<option value="25">25</option>\n<option value="26">26</option>\n<option value="27">27</option>\n<option value="28">28</option>\n<option value="29">29</option>\n<option value="30">30</option>\n<option value="31">31</option>\n)
    expected << "</select>\n"

@@ -274,7 +274,7 @@ def test_select_day_with_custom_prompt
  end

  def test_select_day_with_generic_with_css_classes
-    expected = %(<select id="date_day" name="date[day]" class="day">\n)
+    expected = %(<select id="date_day" name="date[day]" class="day">\n).dup
    expected << %(<option value="1">1</option>\n<option value="2">2</option>\n<option value="3">3</option>\n<option value="4">4</option>\n<option value="5">5</option>\n<option value="6">6</option>\n<option value="7">7</option>\n<option value="8">8</option>\n<option value="9">9</option>\n<option value="10">10</option>\n<option value="11">11</option>\n<option value="12">12</option>\n<option value="13">13</option>\n<option value="14">14</option>\n<option value="15">15</option>\n<option value="16" selected="selected">16</option>\n<option value="17">17</option>\n<option value="18">18</option>\n<option value="19">19</option>\n<option value="20">20</option>\n<option value="21">21</option>\n<option value="22">22</option>\n<option value="23">23</option>\n<option value="24">24</option>\n<option value="25">25</option>\n<option value="26">26</option>\n<option value="27">27</option>\n<option value="28">28</option>\n<option value="29">29</option>\n<option value="30">30</option>\n<option value="31">31</option>\n)
    expected << "</select>\n"

@@ -282,7 +282,7 @@ def test_select_day_with_generic_with_css_classes
  end

  def test_select_day_with_custom_with_css_classes
-    expected = %(<select id="date_day" name="date[day]" class="my-day">\n)
+    expected = %(<select id="date_day" name="date[day]" class="my-day">\n).dup
    expected << %(<option value="1">1</option>\n<option value="2">2</option>\n<option value="3">3</option>\n<option value="4">4</option>\n<option value="5">5</option>\n<option value="6">6</option>\n<option value="7">7</option>\n<option value="8">8</option>\n<option value="9">9</option>\n<option value="10">10</option>\n<option value="11">11</option>\n<option value="12">12</option>\n<option value="13">13</option>\n<option value="14">14</option>\n<option value="15">15</option>\n<option value="16" selected="selected">16</option>\n<option value="17">17</option>\n<option value="18">18</option>\n<option value="19">19</option>\n<option value="20">20</option>\n<option value="21">21</option>\n<option value="22">22</option>\n<option value="23">23</option>\n<option value="24">24</option>\n<option value="25">25</option>\n<option value="26">26</option>\n<option value="27">27</option>\n<option value="28">28</option>\n<option value="29">29</option>\n<option value="30">30</option>\n<option value="31">31</option>\n)
    expected << "</select>\n"

@@ -290,7 +290,7 @@ def test_select_day_with_custom_with_css_classes
  end

  def test_select_month
-    expected = %(<select id="date_month" name="date[month]">\n)
+    expected = %(<select id="date_month" name="date[month]">\n).dup
    expected << %(<option value="1">January</option>\n<option value="2">February</option>\n<option value="3">March</option>\n<option value="4">April</option>\n<option value="5">May</option>\n<option value="6">June</option>\n<option value="7">July</option>\n<option value="8" selected="selected">August</option>\n<option value="9">September</option>\n<option value="10">October</option>\n<option value="11">November</option>\n<option value="12">December</option>\n)
    expected << "</select>\n"

@@ -299,7 +299,7 @@ def test_select_month
  end

  def test_select_month_with_two_digit_numbers
-    expected = %(<select id="date_month" name="date[month]">\n)
+    expected = %(<select id="date_month" name="date[month]">\n).dup
    expected << %(<option value="1">01</option>\n<option value="2">02</option>\n<option value="3">03</option>\n<option value="4">04</option>\n<option value="5">05</option>\n<option value="6">06</option>\n<option value="7">07</option>\n<option value="8" selected="selected">08</option>\n<option value="9">09</option>\n<option value="10">10</option>\n<option value="11">11</option>\n<option value="12">12</option>\n)
    expected << "</select>\n"

@@ -308,7 +308,7 @@ def test_select_month_with_two_digit_numbers
  end

  def test_select_month_with_disabled
-    expected = %(<select id="date_month" name="date[month]" disabled="disabled">\n)
+    expected = %(<select id="date_month" name="date[month]" disabled="disabled">\n).dup
    expected << %(<option value="1">January</option>\n<option value="2">February</option>\n<option value="3">March</option>\n<option value="4">April</option>\n<option value="5">May</option>\n<option value="6">June</option>\n<option value="7">July</option>\n<option value="8" selected="selected">August</option>\n<option value="9">September</option>\n<option value="10">October</option>\n<option value="11">November</option>\n<option value="12">December</option>\n)
    expected << "</select>\n"

@@ -317,7 +317,7 @@ def test_select_month_with_disabled
  end

  def test_select_month_with_field_name_override
-    expected = %(<select id="date_mois" name="date[mois]">\n)
+    expected = %(<select id="date_mois" name="date[mois]">\n).dup
    expected << %(<option value="1">January</option>\n<option value="2">February</option>\n<option value="3">March</option>\n<option value="4">April</option>\n<option value="5">May</option>\n<option value="6">June</option>\n<option value="7">July</option>\n<option value="8" selected="selected">August</option>\n<option value="9">September</option>\n<option value="10">October</option>\n<option value="11">November</option>\n<option value="12">December</option>\n)
    expected << "</select>\n"

@@ -326,7 +326,7 @@ def test_select_month_with_field_name_override
  end

  def test_select_month_with_blank
-    expected = %(<select id="date_month" name="date[month]">\n)
+    expected = %(<select id="date_month" name="date[month]">\n).dup
    expected << %(<option value=""></option>\n<option value="1">January</option>\n<option value="2">February</option>\n<option value="3">March</option>\n<option value="4">April</option>\n<option value="5">May</option>\n<option value="6">June</option>\n<option value="7">July</option>\n<option value="8" selected="selected">August</option>\n<option value="9">September</option>\n<option value="10">October</option>\n<option value="11">November</option>\n<option value="12">December</option>\n)
    expected << "</select>\n"

@@ -335,7 +335,7 @@ def test_select_month_with_blank
  end

  def test_select_month_nil_with_blank
-    expected = %(<select id="date_month" name="date[month]">\n)
+    expected = %(<select id="date_month" name="date[month]">\n).dup
    expected << %(<option value=""></option>\n<option value="1">January</option>\n<option value="2">February</option>\n<option value="3">March</option>\n<option value="4">April</option>\n<option value="5">May</option>\n<option value="6">June</option>\n<option value="7">July</option>\n<option value="8">August</option>\n<option value="9">September</option>\n<option value="10">October</option>\n<option value="11">November</option>\n<option value="12">December</option>\n)
    expected << "</select>\n"

@@ -343,7 +343,7 @@ def test_select_month_nil_with_blank
  end

  def test_select_month_with_numbers
-    expected = %(<select id="date_month" name="date[month]">\n)
+    expected = %(<select id="date_month" name="date[month]">\n).dup
    expected << %(<option value="1">1</option>\n<option value="2">2</option>\n<option value="3">3</option>\n<option value="4">4</option>\n<option value="5">5</option>\n<option value="6">6</option>\n<option value="7">7</option>\n<option value="8" selected="selected">8</option>\n<option value="9">9</option>\n<option value="10">10</option>\n<option value="11">11</option>\n<option value="12">12</option>\n)
    expected << "</select>\n"

@@ -352,7 +352,7 @@ def test_select_month_with_numbers
  end

  def test_select_month_with_numbers_and_names
-    expected = %(<select id="date_month" name="date[month]">\n)
+    expected = %(<select id="date_month" name="date[month]">\n).dup
    expected << %(<option value="1">1 - January</option>\n<option value="2">2 - February</option>\n<option value="3">3 - March</option>\n<option value="4">4 - April</option>\n<option value="5">5 - May</option>\n<option value="6">6 - June</option>\n<option value="7">7 - July</option>\n<option value="8" selected="selected">8 - August</option>\n<option value="9">9 - September</option>\n<option value="10">10 - October</option>\n<option value="11">11 - November</option>\n<option value="12">12 - December</option>\n)
    expected << "</select>\n"

@@ -361,7 +361,7 @@ def test_select_month_with_numbers_and_names
  end

  def test_select_month_with_format_string
-    expected = %(<select id="date_month" name="date[month]">\n)
+    expected = %(<select id="date_month" name="date[month]">\n).dup
    expected << %(<option value="1">January (01)</option>\n<option value="2">February (02)</option>\n<option value="3">March (03)</option>\n<option value="4">April (04)</option>\n<option value="5">May (05)</option>\n<option value="6">June (06)</option>\n<option value="7">July (07)</option>\n<option value="8" selected="selected">August (08)</option>\n<option value="9">September (09)</option>\n<option value="10">October (10)</option>\n<option value="11">November (11)</option>\n<option value="12">December (12)</option>\n)
    expected << "</select>\n"

@@ -371,7 +371,7 @@ def test_select_month_with_format_string
  end

  def test_select_month_with_numbers_and_names_with_abbv
-    expected = %(<select id="date_month" name="date[month]">\n)
+    expected = %(<select id="date_month" name="date[month]">\n).dup
    expected << %(<option value="1">1 - Jan</option>\n<option value="2">2 - Feb</option>\n<option value="3">3 - Mar</option>\n<option value="4">4 - Apr</option>\n<option value="5">5 - May</option>\n<option value="6">6 - Jun</option>\n<option value="7">7 - Jul</option>\n<option value="8" selected="selected">8 - Aug</option>\n<option value="9">9 - Sep</option>\n<option value="10">10 - Oct</option>\n<option value="11">11 - Nov</option>\n<option value="12">12 - Dec</option>\n)
    expected << "</select>\n"

@@ -380,7 +380,7 @@ def test_select_month_with_numbers_and_names_with_abbv
  end

  def test_select_month_with_abbv
-    expected = %(<select id="date_month" name="date[month]">\n)
+    expected = %(<select id="date_month" name="date[month]">\n).dup
    expected << %(<option value="1">Jan</option>\n<option value="2">Feb</option>\n<option value="3">Mar</option>\n<option value="4">Apr</option>\n<option value="5">May</option>\n<option value="6">Jun</option>\n<option value="7">Jul</option>\n<option value="8" selected="selected">Aug</option>\n<option value="9">Sep</option>\n<option value="10">Oct</option>\n<option value="11">Nov</option>\n<option value="12">Dec</option>\n)
    expected << "</select>\n"

@@ -391,7 +391,7 @@ def test_select_month_with_abbv
  def test_select_month_with_custom_names
    month_names = %w(nil Januar Februar Marts April Maj Juni Juli August September Oktober November December)

-    expected = %(<select id="date_month" name="date[month]">\n)
+    expected = %(<select id="date_month" name="date[month]">\n).dup
    1.upto(12) { |month| expected << %(<option value="#{month}"#{' selected="selected"' if month == 8}>#{month_names[month]}</option>\n) }
    expected << "</select>\n"

@@ -402,7 +402,7 @@ def test_select_month_with_custom_names
  def test_select_month_with_zero_indexed_custom_names
    month_names = %w(Januar Februar Marts April Maj Juni Juli August September Oktober November December)

-    expected = %(<select id="date_month" name="date[month]">\n)
+    expected = %(<select id="date_month" name="date[month]">\n).dup
    1.upto(12) { |month| expected << %(<option value="#{month}"#{' selected="selected"' if month == 8}>#{month_names[month - 1]}</option>\n) }
    expected << "</select>\n"

@@ -419,7 +419,7 @@ def test_select_month_with_hidden_and_field_name
  end

  def test_select_month_with_html_options
-    expected = %(<select id="date_month" name="date[month]" class="selector" accesskey="M">\n)
+    expected = %(<select id="date_month" name="date[month]" class="selector" accesskey="M">\n).dup
    expected << %(<option value="1">January</option>\n<option value="2">February</option>\n<option value="3">March</option>\n<option value="4">April</option>\n<option value="5">May</option>\n<option value="6">June</option>\n<option value="7">July</option>\n<option value="8" selected="selected">August</option>\n<option value="9">September</option>\n<option value="10">October</option>\n<option value="11">November</option>\n<option value="12">December</option>\n)
    expected << "</select>\n"

@@ -427,7 +427,7 @@ def test_select_month_with_html_options
  end

  def test_select_month_with_default_prompt
-    expected = %(<select id="date_month" name="date[month]">\n)
+    expected = %(<select id="date_month" name="date[month]">\n).dup
    expected << %(<option value="">Month</option>\n<option value="1">January</option>\n<option value="2">February</option>\n<option value="3">March</option>\n<option value="4">April</option>\n<option value="5">May</option>\n<option value="6">June</option>\n<option value="7">July</option>\n<option value="8" selected="selected">August</option>\n<option value="9">September</option>\n<option value="10">October</option>\n<option value="11">November</option>\n<option value="12">December</option>\n)
    expected << "</select>\n"

@@ -435,7 +435,7 @@ def test_select_month_with_default_prompt
  end

  def test_select_month_with_custom_prompt
-    expected = %(<select id="date_month" name="date[month]">\n)
+    expected = %(<select id="date_month" name="date[month]">\n).dup
    expected << %(<option value="">Choose month</option>\n<option value="1">January</option>\n<option value="2">February</option>\n<option value="3">March</option>\n<option value="4">April</option>\n<option value="5">May</option>\n<option value="6">June</option>\n<option value="7">July</option>\n<option value="8" selected="selected">August</option>\n<option value="9">September</option>\n<option value="10">October</option>\n<option value="11">November</option>\n<option value="12">December</option>\n)
    expected << "</select>\n"

@@ -443,7 +443,7 @@ def test_select_month_with_custom_prompt
  end

  def test_select_month_with_generic_with_css_classes
-    expected = %(<select id="date_month" name="date[month]" class="month">\n)
+    expected = %(<select id="date_month" name="date[month]" class="month">\n).dup
    expected << %(<option value="1">January</option>\n<option value="2">February</option>\n<option value="3">March</option>\n<option value="4">April</option>\n<option value="5">May</option>\n<option value="6">June</option>\n<option value="7">July</option>\n<option value="8" selected="selected">August</option>\n<option value="9">September</option>\n<option value="10">October</option>\n<option value="11">November</option>\n<option value="12">December</option>\n)
    expected << "</select>\n"

@@ -451,7 +451,7 @@ def test_select_month_with_generic_with_css_classes
  end

  def test_select_month_with_custom_with_css_classes
-    expected = %(<select id="date_month" name="date[month]" class="my-month">\n)
+    expected = %(<select id="date_month" name="date[month]" class="my-month">\n).dup
    expected << %(<option value="1">January</option>\n<option value="2">February</option>\n<option value="3">March</option>\n<option value="4">April</option>\n<option value="5">May</option>\n<option value="6">June</option>\n<option value="7">July</option>\n<option value="8" selected="selected">August</option>\n<option value="9">September</option>\n<option value="10">October</option>\n<option value="11">November</option>\n<option value="12">December</option>\n)
    expected << "</select>\n"

@@ -459,7 +459,7 @@ def test_select_month_with_custom_with_css_classes
  end

  def test_select_year
-    expected = %(<select id="date_year" name="date[year]">\n)
+    expected = %(<select id="date_year" name="date[year]">\n).dup
    expected << %(<option value="2003" selected="selected">2003</option>\n<option value="2004">2004</option>\n<option value="2005">2005</option>\n)
    expected << "</select>\n"

@@ -468,7 +468,7 @@ def test_select_year
  end

  def test_select_year_with_disabled
-    expected = %(<select id="date_year" name="date[year]" disabled="disabled">\n)
+    expected = %(<select id="date_year" name="date[year]" disabled="disabled">\n).dup
    expected << %(<option value="2003" selected="selected">2003</option>\n<option value="2004">2004</option>\n<option value="2005">2005</option>\n)
    expected << "</select>\n"

@@ -477,7 +477,7 @@ def test_select_year_with_disabled
  end

  def test_select_year_with_field_name_override
-    expected = %(<select id="date_annee" name="date[annee]">\n)
+    expected = %(<select id="date_annee" name="date[annee]">\n).dup
    expected << %(<option value="2003" selected="selected">2003</option>\n<option value="2004">2004</option>\n<option value="2005">2005</option>\n)
    expected << "</select>\n"

@@ -486,7 +486,7 @@ def test_select_year_with_field_name_override
  end

  def test_select_year_with_type_discarding
-    expected = %(<select id="date_year" name="date_year">\n)
+    expected = %(<select id="date_year" name="date_year">\n).dup
    expected << %(<option value="2003" selected="selected">2003</option>\n<option value="2004">2004</option>\n<option value="2005">2005</option>\n)
    expected << "</select>\n"

@@ -497,7 +497,7 @@ def test_select_year_with_type_discarding
  end

  def test_select_year_descending
-    expected = %(<select id="date_year" name="date[year]">\n)
+    expected = %(<select id="date_year" name="date[year]">\n).dup
    expected << %(<option value="2005" selected="selected">2005</option>\n<option value="2004">2004</option>\n<option value="2003">2003</option>\n)
    expected << "</select>\n"

@@ -514,7 +514,7 @@ def test_select_year_with_hidden_and_field_name
  end

  def test_select_year_with_html_options
-    expected = %(<select id="date_year" name="date[year]" class="selector" accesskey="M">\n)
+    expected = %(<select id="date_year" name="date[year]" class="selector" accesskey="M">\n).dup
    expected << %(<option value="2003" selected="selected">2003</option>\n<option value="2004">2004</option>\n<option value="2005">2005</option>\n)
    expected << "</select>\n"

@@ -522,7 +522,7 @@ def test_select_year_with_html_options
  end

  def test_select_year_with_default_prompt
-    expected = %(<select id="date_year" name="date[year]">\n)
+    expected = %(<select id="date_year" name="date[year]">\n).dup
    expected << %(<option value="">Year</option>\n<option value="2003">2003</option>\n<option value="2004">2004</option>\n<option value="2005">2005</option>\n)
    expected << "</select>\n"

@@ -530,7 +530,7 @@ def test_select_year_with_default_prompt
  end

  def test_select_year_with_custom_prompt
-    expected = %(<select id="date_year" name="date[year]">\n)
+    expected = %(<select id="date_year" name="date[year]">\n).dup
    expected << %(<option value="">Choose year</option>\n<option value="2003">2003</option>\n<option value="2004">2004</option>\n<option value="2005">2005</option>\n)
    expected << "</select>\n"

@@ -538,7 +538,7 @@ def test_select_year_with_custom_prompt
  end

  def test_select_year_with_generic_with_css_classes
-    expected = %(<select id="date_year" name="date[year]" class="year">\n)
+    expected = %(<select id="date_year" name="date[year]" class="year">\n).dup
    expected << %(<option value="2003">2003</option>\n<option value="2004">2004</option>\n<option value="2005">2005</option>\n)
    expected << "</select>\n"

@@ -546,7 +546,7 @@ def test_select_year_with_generic_with_css_classes
  end

  def test_select_year_with_custom_with_css_classes
-    expected = %(<select id="date_year" name="date[year]" class="my-year">\n)
+    expected = %(<select id="date_year" name="date[year]" class="my-year">\n).dup
    expected << %(<option value="2003">2003</option>\n<option value="2004">2004</option>\n<option value="2005">2005</option>\n)
    expected << "</select>\n"

@@ -554,14 +554,14 @@ def test_select_year_with_custom_with_css_classes
  end

  def test_select_year_with_position
-    expected = %(<select id="date_year_1i" name="date[year(1i)]">\n)
+    expected = %(<select id="date_year_1i" name="date[year(1i)]">\n).dup
    expected << %(<option value="2003">2003</option>\n<option value="2004">2004</option>\n<option value="2005">2005</option>\n)
    expected << "</select>\n"
    assert_dom_equal expected, select_year(Date.current, include_position: true,  start_year: 2003, end_year: 2005)
  end

  def test_select_hour
-    expected = %(<select id="date_hour" name="date[hour]">\n)
+    expected = %(<select id="date_hour" name="date[hour]">\n).dup
    expected << %(<option value="00">00</option>\n<option value="01">01</option>\n<option value="02">02</option>\n<option value="03">03</option>\n<option value="04">04</option>\n<option value="05">05</option>\n<option value="06">06</option>\n<option value="07">07</option>\n<option value="08" selected="selected">08</option>\n<option value="09">09</option>\n<option value="10">10</option>\n<option value="11">11</option>\n<option value="12">12</option>\n<option value="13">13</option>\n<option value="14">14</option>\n<option value="15">15</option>\n<option value="16">16</option>\n<option value="17">17</option>\n<option value="18">18</option>\n<option value="19">19</option>\n<option value="20">20</option>\n<option value="21">21</option>\n<option value="22">22</option>\n<option value="23">23</option>\n)
    expected << "</select>\n"

@@ -569,7 +569,7 @@ def test_select_hour
  end

  def test_select_hour_with_ampm
-    expected = %(<select id="date_hour" name="date[hour]">\n)
+    expected = %(<select id="date_hour" name="date[hour]">\n).dup
    expected << %(<option value="00">12 AM</option>\n<option value="01">01 AM</option>\n<option value="02">02 AM</option>\n<option value="03">03 AM</option>\n<option value="04">04 AM</option>\n<option value="05">05 AM</option>\n<option value="06">06 AM</option>\n<option value="07">07 AM</option>\n<option value="08" selected="selected">08 AM</option>\n<option value="09">09 AM</option>\n<option value="10">10 AM</option>\n<option value="11">11 AM</option>\n<option value="12">12 PM</option>\n<option value="13">01 PM</option>\n<option value="14">02 PM</option>\n<option value="15">03 PM</option>\n<option value="16">04 PM</option>\n<option value="17">05 PM</option>\n<option value="18">06 PM</option>\n<option value="19">07 PM</option>\n<option value="20">08 PM</option>\n<option value="21">09 PM</option>\n<option value="22">10 PM</option>\n<option value="23">11 PM</option>\n)
    expected << "</select>\n"

@@ -577,7 +577,7 @@ def test_select_hour_with_ampm
  end

  def test_select_hour_with_disabled
-    expected = %(<select id="date_hour" name="date[hour]" disabled="disabled">\n)
+    expected = %(<select id="date_hour" name="date[hour]" disabled="disabled">\n).dup
    expected << %(<option value="00">00</option>\n<option value="01">01</option>\n<option value="02">02</option>\n<option value="03">03</option>\n<option value="04">04</option>\n<option value="05">05</option>\n<option value="06">06</option>\n<option value="07">07</option>\n<option value="08" selected="selected">08</option>\n<option value="09">09</option>\n<option value="10">10</option>\n<option value="11">11</option>\n<option value="12">12</option>\n<option value="13">13</option>\n<option value="14">14</option>\n<option value="15">15</option>\n<option value="16">16</option>\n<option value="17">17</option>\n<option value="18">18</option>\n<option value="19">19</option>\n<option value="20">20</option>\n<option value="21">21</option>\n<option value="22">22</option>\n<option value="23">23</option>\n)
    expected << "</select>\n"

@@ -585,7 +585,7 @@ def test_select_hour_with_disabled
  end

  def test_select_hour_with_field_name_override
-    expected = %(<select id="date_heure" name="date[heure]">\n)
+    expected = %(<select id="date_heure" name="date[heure]">\n).dup
    expected << %(<option value="00">00</option>\n<option value="01">01</option>\n<option value="02">02</option>\n<option value="03">03</option>\n<option value="04">04</option>\n<option value="05">05</option>\n<option value="06">06</option>\n<option value="07">07</option>\n<option value="08" selected="selected">08</option>\n<option value="09">09</option>\n<option value="10">10</option>\n<option value="11">11</option>\n<option value="12">12</option>\n<option value="13">13</option>\n<option value="14">14</option>\n<option value="15">15</option>\n<option value="16">16</option>\n<option value="17">17</option>\n<option value="18">18</option>\n<option value="19">19</option>\n<option value="20">20</option>\n<option value="21">21</option>\n<option value="22">22</option>\n<option value="23">23</option>\n)
    expected << "</select>\n"

@@ -593,7 +593,7 @@ def test_select_hour_with_field_name_override
  end

  def test_select_hour_with_blank
-    expected = %(<select id="date_hour" name="date[hour]">\n)
+    expected = %(<select id="date_hour" name="date[hour]">\n).dup
    expected << %(<option value=""></option>\n<option value="00">00</option>\n<option value="01">01</option>\n<option value="02">02</option>\n<option value="03">03</option>\n<option value="04">04</option>\n<option value="05">05</option>\n<option value="06">06</option>\n<option value="07">07</option>\n<option value="08" selected="selected">08</option>\n<option value="09">09</option>\n<option value="10">10</option>\n<option value="11">11</option>\n<option value="12">12</option>\n<option value="13">13</option>\n<option value="14">14</option>\n<option value="15">15</option>\n<option value="16">16</option>\n<option value="17">17</option>\n<option value="18">18</option>\n<option value="19">19</option>\n<option value="20">20</option>\n<option value="21">21</option>\n<option value="22">22</option>\n<option value="23">23</option>\n)
    expected << "</select>\n"

@@ -601,7 +601,7 @@ def test_select_hour_with_blank
  end

  def test_select_hour_nil_with_blank
-    expected = %(<select id="date_hour" name="date[hour]">\n)
+    expected = %(<select id="date_hour" name="date[hour]">\n).dup
    expected << %(<option value=""></option>\n<option value="00">00</option>\n<option value="01">01</option>\n<option value="02">02</option>\n<option value="03">03</option>\n<option value="04">04</option>\n<option value="05">05</option>\n<option value="06">06</option>\n<option value="07">07</option>\n<option value="08">08</option>\n<option value="09">09</option>\n<option value="10">10</option>\n<option value="11">11</option>\n<option value="12">12</option>\n<option value="13">13</option>\n<option value="14">14</option>\n<option value="15">15</option>\n<option value="16">16</option>\n<option value="17">17</option>\n<option value="18">18</option>\n<option value="19">19</option>\n<option value="20">20</option>\n<option value="21">21</option>\n<option value="22">22</option>\n<option value="23">23</option>\n)
    expected << "</select>\n"

@@ -609,7 +609,7 @@ def test_select_hour_nil_with_blank
  end

  def test_select_hour_with_html_options
-    expected = %(<select id="date_hour" name="date[hour]" class="selector" accesskey="M">\n)
+    expected = %(<select id="date_hour" name="date[hour]" class="selector" accesskey="M">\n).dup
    expected << %(<option value="00">00</option>\n<option value="01">01</option>\n<option value="02">02</option>\n<option value="03">03</option>\n<option value="04">04</option>\n<option value="05">05</option>\n<option value="06">06</option>\n<option value="07">07</option>\n<option value="08" selected="selected">08</option>\n<option value="09">09</option>\n<option value="10">10</option>\n<option value="11">11</option>\n<option value="12">12</option>\n<option value="13">13</option>\n<option value="14">14</option>\n<option value="15">15</option>\n<option value="16">16</option>\n<option value="17">17</option>\n<option value="18">18</option>\n<option value="19">19</option>\n<option value="20">20</option>\n<option value="21">21</option>\n<option value="22">22</option>\n<option value="23">23</option>\n)
    expected << "</select>\n"

@@ -617,7 +617,7 @@ def test_select_hour_with_html_options
  end

  def test_select_hour_with_default_prompt
-    expected = %(<select id="date_hour" name="date[hour]">\n)
+    expected = %(<select id="date_hour" name="date[hour]">\n).dup
    expected << %(<option value="">Hour</option>\n<option value="00">00</option>\n<option value="01">01</option>\n<option value="02">02</option>\n<option value="03">03</option>\n<option value="04">04</option>\n<option value="05">05</option>\n<option value="06">06</option>\n<option value="07">07</option>\n<option value="08" selected="selected">08</option>\n<option value="09">09</option>\n<option value="10">10</option>\n<option value="11">11</option>\n<option value="12">12</option>\n<option value="13">13</option>\n<option value="14">14</option>\n<option value="15">15</option>\n<option value="16">16</option>\n<option value="17">17</option>\n<option value="18">18</option>\n<option value="19">19</option>\n<option value="20">20</option>\n<option value="21">21</option>\n<option value="22">22</option>\n<option value="23">23</option>\n)
    expected << "</select>\n"

@@ -625,7 +625,7 @@ def test_select_hour_with_default_prompt
  end

  def test_select_hour_with_custom_prompt
-    expected = %(<select id="date_hour" name="date[hour]">\n)
+    expected = %(<select id="date_hour" name="date[hour]">\n).dup
    expected << %(<option value="">Choose hour</option>\n<option value="00">00</option>\n<option value="01">01</option>\n<option value="02">02</option>\n<option value="03">03</option>\n<option value="04">04</option>\n<option value="05">05</option>\n<option value="06">06</option>\n<option value="07">07</option>\n<option value="08" selected="selected">08</option>\n<option value="09">09</option>\n<option value="10">10</option>\n<option value="11">11</option>\n<option value="12">12</option>\n<option value="13">13</option>\n<option value="14">14</option>\n<option value="15">15</option>\n<option value="16">16</option>\n<option value="17">17</option>\n<option value="18">18</option>\n<option value="19">19</option>\n<option value="20">20</option>\n<option value="21">21</option>\n<option value="22">22</option>\n<option value="23">23</option>\n)
    expected << "</select>\n"

@@ -633,7 +633,7 @@ def test_select_hour_with_custom_prompt
  end

  def test_select_hour_with_generic_with_css_classes
-    expected = %(<select id="date_hour" name="date[hour]" class="hour">\n)
+    expected = %(<select id="date_hour" name="date[hour]" class="hour">\n).dup
    expected << %(<option value="00">00</option>\n<option value="01">01</option>\n<option value="02">02</option>\n<option value="03">03</option>\n<option value="04">04</option>\n<option value="05">05</option>\n<option value="06">06</option>\n<option value="07">07</option>\n<option value="08" selected="selected">08</option>\n<option value="09">09</option>\n<option value="10">10</option>\n<option value="11">11</option>\n<option value="12">12</option>\n<option value="13">13</option>\n<option value="14">14</option>\n<option value="15">15</option>\n<option value="16">16</option>\n<option value="17">17</option>\n<option value="18">18</option>\n<option value="19">19</option>\n<option value="20">20</option>\n<option value="21">21</option>\n<option value="22">22</option>\n<option value="23">23</option>\n)
    expected << "</select>\n"

@@ -641,7 +641,7 @@ def test_select_hour_with_generic_with_css_classes
  end

  def test_select_hour_with_custom_with_css_classes
-    expected = %(<select id="date_hour" name="date[hour]" class="my-hour">\n)
+    expected = %(<select id="date_hour" name="date[hour]" class="my-hour">\n).dup
    expected << %(<option value="00">00</option>\n<option value="01">01</option>\n<option value="02">02</option>\n<option value="03">03</option>\n<option value="04">04</option>\n<option value="05">05</option>\n<option value="06">06</option>\n<option value="07">07</option>\n<option value="08" selected="selected">08</option>\n<option value="09">09</option>\n<option value="10">10</option>\n<option value="11">11</option>\n<option value="12">12</option>\n<option value="13">13</option>\n<option value="14">14</option>\n<option value="15">15</option>\n<option value="16">16</option>\n<option value="17">17</option>\n<option value="18">18</option>\n<option value="19">19</option>\n<option value="20">20</option>\n<option value="21">21</option>\n<option value="22">22</option>\n<option value="23">23</option>\n)
    expected << "</select>\n"

@@ -649,7 +649,7 @@ def test_select_hour_with_custom_with_css_classes
  end

  def test_select_minute
-    expected = %(<select id="date_minute" name="date[minute]">\n)
+    expected = %(<select id="date_minute" name="date[minute]">\n).dup
    expected << %(<option value="00">00</option>\n<option value="01">01</option>\n<option value="02">02</option>\n<option value="03">03</option>\n<option value="04" selected="selected">04</option>\n<option value="05">05</option>\n<option value="06">06</option>\n<option value="07">07</option>\n<option value="08">08</option>\n<option value="09">09</option>\n<option value="10">10</option>\n<option value="11">11</option>\n<option value="12">12</option>\n<option value="13">13</option>\n<option value="14">14</option>\n<option value="15">15</option>\n<option value="16">16</option>\n<option value="17">17</option>\n<option value="18">18</option>\n<option value="19">19</option>\n<option value="20">20</option>\n<option value="21">21</option>\n<option value="22">22</option>\n<option value="23">23</option>\n<option value="24">24</option>\n<option value="25">25</option>\n<option value="26">26</option>\n<option value="27">27</option>\n<option value="28">28</option>\n<option value="29">29</option>\n<option value="30">30</option>\n<option value="31">31</option>\n<option value="32">32</option>\n<option value="33">33</option>\n<option value="34">34</option>\n<option value="35">35</option>\n<option value="36">36</option>\n<option value="37">37</option>\n<option value="38">38</option>\n<option value="39">39</option>\n<option value="40">40</option>\n<option value="41">41</option>\n<option value="42">42</option>\n<option value="43">43</option>\n<option value="44">44</option>\n<option value="45">45</option>\n<option value="46">46</option>\n<option value="47">47</option>\n<option value="48">48</option>\n<option value="49">49</option>\n<option value="50">50</option>\n<option value="51">51</option>\n<option value="52">52</option>\n<option value="53">53</option>\n<option value="54">54</option>\n<option value="55">55</option>\n<option value="56">56</option>\n<option value="57">57</option>\n<option value="58">58</option>\n<option value="59">59</option>\n)
    expected << "</select>\n"

@@ -657,7 +657,7 @@ def test_select_minute
  end

  def test_select_minute_with_disabled
-    expected = %(<select id="date_minute" name="date[minute]" disabled="disabled">\n)
+    expected = %(<select id="date_minute" name="date[minute]" disabled="disabled">\n).dup
    expected << %(<option value="00">00</option>\n<option value="01">01</option>\n<option value="02">02</option>\n<option value="03">03</option>\n<option value="04" selected="selected">04</option>\n<option value="05">05</option>\n<option value="06">06</option>\n<option value="07">07</option>\n<option value="08">08</option>\n<option value="09">09</option>\n<option value="10">10</option>\n<option value="11">11</option>\n<option value="12">12</option>\n<option value="13">13</option>\n<option value="14">14</option>\n<option value="15">15</option>\n<option value="16">16</option>\n<option value="17">17</option>\n<option value="18">18</option>\n<option value="19">19</option>\n<option value="20">20</option>\n<option value="21">21</option>\n<option value="22">22</option>\n<option value="23">23</option>\n<option value="24">24</option>\n<option value="25">25</option>\n<option value="26">26</option>\n<option value="27">27</option>\n<option value="28">28</option>\n<option value="29">29</option>\n<option value="30">30</option>\n<option value="31">31</option>\n<option value="32">32</option>\n<option value="33">33</option>\n<option value="34">34</option>\n<option value="35">35</option>\n<option value="36">36</option>\n<option value="37">37</option>\n<option value="38">38</option>\n<option value="39">39</option>\n<option value="40">40</option>\n<option value="41">41</option>\n<option value="42">42</option>\n<option value="43">43</option>\n<option value="44">44</option>\n<option value="45">45</option>\n<option value="46">46</option>\n<option value="47">47</option>\n<option value="48">48</option>\n<option value="49">49</option>\n<option value="50">50</option>\n<option value="51">51</option>\n<option value="52">52</option>\n<option value="53">53</option>\n<option value="54">54</option>\n<option value="55">55</option>\n<option value="56">56</option>\n<option value="57">57</option>\n<option value="58">58</option>\n<option value="59">59</option>\n)
    expected << "</select>\n"

@@ -665,7 +665,7 @@ def test_select_minute_with_disabled
  end

  def test_select_minute_with_field_name_override
-    expected = %(<select id="date_minuto" name="date[minuto]">\n)
+    expected = %(<select id="date_minuto" name="date[minuto]">\n).dup
    expected << %(<option value="00">00</option>\n<option value="01">01</option>\n<option value="02">02</option>\n<option value="03">03</option>\n<option value="04" selected="selected">04</option>\n<option value="05">05</option>\n<option value="06">06</option>\n<option value="07">07</option>\n<option value="08">08</option>\n<option value="09">09</option>\n<option value="10">10</option>\n<option value="11">11</option>\n<option value="12">12</option>\n<option value="13">13</option>\n<option value="14">14</option>\n<option value="15">15</option>\n<option value="16">16</option>\n<option value="17">17</option>\n<option value="18">18</option>\n<option value="19">19</option>\n<option value="20">20</option>\n<option value="21">21</option>\n<option value="22">22</option>\n<option value="23">23</option>\n<option value="24">24</option>\n<option value="25">25</option>\n<option value="26">26</option>\n<option value="27">27</option>\n<option value="28">28</option>\n<option value="29">29</option>\n<option value="30">30</option>\n<option value="31">31</option>\n<option value="32">32</option>\n<option value="33">33</option>\n<option value="34">34</option>\n<option value="35">35</option>\n<option value="36">36</option>\n<option value="37">37</option>\n<option value="38">38</option>\n<option value="39">39</option>\n<option value="40">40</option>\n<option value="41">41</option>\n<option value="42">42</option>\n<option value="43">43</option>\n<option value="44">44</option>\n<option value="45">45</option>\n<option value="46">46</option>\n<option value="47">47</option>\n<option value="48">48</option>\n<option value="49">49</option>\n<option value="50">50</option>\n<option value="51">51</option>\n<option value="52">52</option>\n<option value="53">53</option>\n<option value="54">54</option>\n<option value="55">55</option>\n<option value="56">56</option>\n<option value="57">57</option>\n<option value="58">58</option>\n<option value="59">59</option>\n)
    expected << "</select>\n"

@@ -673,7 +673,7 @@ def test_select_minute_with_field_name_override
  end

  def test_select_minute_with_blank
-    expected = %(<select id="date_minute" name="date[minute]">\n)
+    expected = %(<select id="date_minute" name="date[minute]">\n).dup
    expected << %(<option value=""></option>\n<option value="00">00</option>\n<option value="01">01</option>\n<option value="02">02</option>\n<option value="03">03</option>\n<option value="04" selected="selected">04</option>\n<option value="05">05</option>\n<option value="06">06</option>\n<option value="07">07</option>\n<option value="08">08</option>\n<option value="09">09</option>\n<option value="10">10</option>\n<option value="11">11</option>\n<option value="12">12</option>\n<option value="13">13</option>\n<option value="14">14</option>\n<option value="15">15</option>\n<option value="16">16</option>\n<option value="17">17</option>\n<option value="18">18</option>\n<option value="19">19</option>\n<option value="20">20</option>\n<option value="21">21</option>\n<option value="22">22</option>\n<option value="23">23</option>\n<option value="24">24</option>\n<option value="25">25</option>\n<option value="26">26</option>\n<option value="27">27</option>\n<option value="28">28</option>\n<option value="29">29</option>\n<option value="30">30</option>\n<option value="31">31</option>\n<option value="32">32</option>\n<option value="33">33</option>\n<option value="34">34</option>\n<option value="35">35</option>\n<option value="36">36</option>\n<option value="37">37</option>\n<option value="38">38</option>\n<option value="39">39</option>\n<option value="40">40</option>\n<option value="41">41</option>\n<option value="42">42</option>\n<option value="43">43</option>\n<option value="44">44</option>\n<option value="45">45</option>\n<option value="46">46</option>\n<option value="47">47</option>\n<option value="48">48</option>\n<option value="49">49</option>\n<option value="50">50</option>\n<option value="51">51</option>\n<option value="52">52</option>\n<option value="53">53</option>\n<option value="54">54</option>\n<option value="55">55</option>\n<option value="56">56</option>\n<option value="57">57</option>\n<option value="58">58</option>\n<option value="59">59</option>\n)
    expected << "</select>\n"

@@ -681,7 +681,7 @@ def test_select_minute_with_blank
  end

  def test_select_minute_with_blank_and_step
-    expected = %(<select id="date_minute" name="date[minute]">\n)
+    expected = %(<select id="date_minute" name="date[minute]">\n).dup
    expected << %(<option value=""></option>\n<option value="00">00</option>\n<option value="15">15</option>\n<option value="30">30</option>\n<option value="45">45</option>\n)
    expected << "</select>\n"

@@ -689,7 +689,7 @@ def test_select_minute_with_blank_and_step
  end

  def test_select_minute_nil_with_blank
-    expected = %(<select id="date_minute" name="date[minute]">\n)
+    expected = %(<select id="date_minute" name="date[minute]">\n).dup
    expected << %(<option value=""></option>\n<option value="00">00</option>\n<option value="01">01</option>\n<option value="02">02</option>\n<option value="03">03</option>\n<option value="04">04</option>\n<option value="05">05</option>\n<option value="06">06</option>\n<option value="07">07</option>\n<option value="08">08</option>\n<option value="09">09</option>\n<option value="10">10</option>\n<option value="11">11</option>\n<option value="12">12</option>\n<option value="13">13</option>\n<option value="14">14</option>\n<option value="15">15</option>\n<option value="16">16</option>\n<option value="17">17</option>\n<option value="18">18</option>\n<option value="19">19</option>\n<option value="20">20</option>\n<option value="21">21</option>\n<option value="22">22</option>\n<option value="23">23</option>\n<option value="24">24</option>\n<option value="25">25</option>\n<option value="26">26</option>\n<option value="27">27</option>\n<option value="28">28</option>\n<option value="29">29</option>\n<option value="30">30</option>\n<option value="31">31</option>\n<option value="32">32</option>\n<option value="33">33</option>\n<option value="34">34</option>\n<option value="35">35</option>\n<option value="36">36</option>\n<option value="37">37</option>\n<option value="38">38</option>\n<option value="39">39</option>\n<option value="40">40</option>\n<option value="41">41</option>\n<option value="42">42</option>\n<option value="43">43</option>\n<option value="44">44</option>\n<option value="45">45</option>\n<option value="46">46</option>\n<option value="47">47</option>\n<option value="48">48</option>\n<option value="49">49</option>\n<option value="50">50</option>\n<option value="51">51</option>\n<option value="52">52</option>\n<option value="53">53</option>\n<option value="54">54</option>\n<option value="55">55</option>\n<option value="56">56</option>\n<option value="57">57</option>\n<option value="58">58</option>\n<option value="59">59</option>\n)
    expected << "</select>\n"

@@ -697,7 +697,7 @@ def test_select_minute_nil_with_blank
  end

  def test_select_minute_nil_with_blank_and_step
-    expected = %(<select id="date_minute" name="date[minute]">\n)
+    expected = %(<select id="date_minute" name="date[minute]">\n).dup
    expected << %(<option value=""></option>\n<option value="00">00</option>\n<option value="15">15</option>\n<option value="30">30</option>\n<option value="45">45</option>\n)
    expected << "</select>\n"

@@ -713,7 +713,7 @@ def test_select_minute_with_hidden_and_field_name
  end

  def test_select_minute_with_html_options
-    expected = %(<select id="date_minute" name="date[minute]" class="selector" accesskey="M">\n)
+    expected = %(<select id="date_minute" name="date[minute]" class="selector" accesskey="M">\n).dup
    expected << %(<option value="00">00</option>\n<option value="01">01</option>\n<option value="02">02</option>\n<option value="03">03</option>\n<option value="04" selected="selected">04</option>\n<option value="05">05</option>\n<option value="06">06</option>\n<option value="07">07</option>\n<option value="08">08</option>\n<option value="09">09</option>\n<option value="10">10</option>\n<option value="11">11</option>\n<option value="12">12</option>\n<option value="13">13</option>\n<option value="14">14</option>\n<option value="15">15</option>\n<option value="16">16</option>\n<option value="17">17</option>\n<option value="18">18</option>\n<option value="19">19</option>\n<option value="20">20</option>\n<option value="21">21</option>\n<option value="22">22</option>\n<option value="23">23</option>\n<option value="24">24</option>\n<option value="25">25</option>\n<option value="26">26</option>\n<option value="27">27</option>\n<option value="28">28</option>\n<option value="29">29</option>\n<option value="30">30</option>\n<option value="31">31</option>\n<option value="32">32</option>\n<option value="33">33</option>\n<option value="34">34</option>\n<option value="35">35</option>\n<option value="36">36</option>\n<option value="37">37</option>\n<option value="38">38</option>\n<option value="39">39</option>\n<option value="40">40</option>\n<option value="41">41</option>\n<option value="42">42</option>\n<option value="43">43</option>\n<option value="44">44</option>\n<option value="45">45</option>\n<option value="46">46</option>\n<option value="47">47</option>\n<option value="48">48</option>\n<option value="49">49</option>\n<option value="50">50</option>\n<option value="51">51</option>\n<option value="52">52</option>\n<option value="53">53</option>\n<option value="54">54</option>\n<option value="55">55</option>\n<option value="56">56</option>\n<option value="57">57</option>\n<option value="58">58</option>\n<option value="59">59</option>\n)
    expected << "</select>\n"

@@ -721,7 +721,7 @@ def test_select_minute_with_html_options
  end

  def test_select_minute_with_default_prompt
-    expected = %(<select id="date_minute" name="date[minute]">\n)
+    expected = %(<select id="date_minute" name="date[minute]">\n).dup
    expected << %(<option value="">Minute</option>\n<option value="00">00</option>\n<option value="01">01</option>\n<option value="02">02</option>\n<option value="03">03</option>\n<option value="04" selected="selected">04</option>\n<option value="05">05</option>\n<option value="06">06</option>\n<option value="07">07</option>\n<option value="08">08</option>\n<option value="09">09</option>\n<option value="10">10</option>\n<option value="11">11</option>\n<option value="12">12</option>\n<option value="13">13</option>\n<option value="14">14</option>\n<option value="15">15</option>\n<option value="16">16</option>\n<option value="17">17</option>\n<option value="18">18</option>\n<option value="19">19</option>\n<option value="20">20</option>\n<option value="21">21</option>\n<option value="22">22</option>\n<option value="23">23</option>\n<option value="24">24</option>\n<option value="25">25</option>\n<option value="26">26</option>\n<option value="27">27</option>\n<option value="28">28</option>\n<option value="29">29</option>\n<option value="30">30</option>\n<option value="31">31</option>\n<option value="32">32</option>\n<option value="33">33</option>\n<option value="34">34</option>\n<option value="35">35</option>\n<option value="36">36</option>\n<option value="37">37</option>\n<option value="38">38</option>\n<option value="39">39</option>\n<option value="40">40</option>\n<option value="41">41</option>\n<option value="42">42</option>\n<option value="43">43</option>\n<option value="44">44</option>\n<option value="45">45</option>\n<option value="46">46</option>\n<option value="47">47</option>\n<option value="48">48</option>\n<option value="49">49</option>\n<option value="50">50</option>\n<option value="51">51</option>\n<option value="52">52</option>\n<option value="53">53</option>\n<option value="54">54</option>\n<option value="55">55</option>\n<option value="56">56</option>\n<option value="57">57</option>\n<option value="58">58</option>\n<option value="59">59</option>\n)
    expected << "</select>\n"

@@ -729,7 +729,7 @@ def test_select_minute_with_default_prompt
  end

  def test_select_minute_with_custom_prompt
-    expected = %(<select id="date_minute" name="date[minute]">\n)
+    expected = %(<select id="date_minute" name="date[minute]">\n).dup
    expected << %(<option value="">Choose minute</option>\n<option value="00">00</option>\n<option value="01">01</option>\n<option value="02">02</option>\n<option value="03">03</option>\n<option value="04" selected="selected">04</option>\n<option value="05">05</option>\n<option value="06">06</option>\n<option value="07">07</option>\n<option value="08">08</option>\n<option value="09">09</option>\n<option value="10">10</option>\n<option value="11">11</option>\n<option value="12">12</option>\n<option value="13">13</option>\n<option value="14">14</option>\n<option value="15">15</option>\n<option value="16">16</option>\n<option value="17">17</option>\n<option value="18">18</option>\n<option value="19">19</option>\n<option value="20">20</option>\n<option value="21">21</option>\n<option value="22">22</option>\n<option value="23">23</option>\n<option value="24">24</option>\n<option value="25">25</option>\n<option value="26">26</option>\n<option value="27">27</option>\n<option value="28">28</option>\n<option value="29">29</option>\n<option value="30">30</option>\n<option value="31">31</option>\n<option value="32">32</option>\n<option value="33">33</option>\n<option value="34">34</option>\n<option value="35">35</option>\n<option value="36">36</option>\n<option value="37">37</option>\n<option value="38">38</option>\n<option value="39">39</option>\n<option value="40">40</option>\n<option value="41">41</option>\n<option value="42">42</option>\n<option value="43">43</option>\n<option value="44">44</option>\n<option value="45">45</option>\n<option value="46">46</option>\n<option value="47">47</option>\n<option value="48">48</option>\n<option value="49">49</option>\n<option value="50">50</option>\n<option value="51">51</option>\n<option value="52">52</option>\n<option value="53">53</option>\n<option value="54">54</option>\n<option value="55">55</option>\n<option value="56">56</option>\n<option value="57">57</option>\n<option value="58">58</option>\n<option value="59">59</option>\n)
    expected << "</select>\n"

@@ -737,7 +737,7 @@ def test_select_minute_with_custom_prompt
  end

  def test_select_minute_with_generic_with_css_classes
-    expected = %(<select id="date_minute" name="date[minute]" class="minute">\n)
+    expected = %(<select id="date_minute" name="date[minute]" class="minute">\n).dup
    expected << %(<option value="00">00</option>\n<option value="01">01</option>\n<option value="02">02</option>\n<option value="03">03</option>\n<option value="04" selected="selected">04</option>\n<option value="05">05</option>\n<option value="06">06</option>\n<option value="07">07</option>\n<option value="08">08</option>\n<option value="09">09</option>\n<option value="10">10</option>\n<option value="11">11</option>\n<option value="12">12</option>\n<option value="13">13</option>\n<option value="14">14</option>\n<option value="15">15</option>\n<option value="16">16</option>\n<option value="17">17</option>\n<option value="18">18</option>\n<option value="19">19</option>\n<option value="20">20</option>\n<option value="21">21</option>\n<option value="22">22</option>\n<option value="23">23</option>\n<option value="24">24</option>\n<option value="25">25</option>\n<option value="26">26</option>\n<option value="27">27</option>\n<option value="28">28</option>\n<option value="29">29</option>\n<option value="30">30</option>\n<option value="31">31</option>\n<option value="32">32</option>\n<option value="33">33</option>\n<option value="34">34</option>\n<option value="35">35</option>\n<option value="36">36</option>\n<option value="37">37</option>\n<option value="38">38</option>\n<option value="39">39</option>\n<option value="40">40</option>\n<option value="41">41</option>\n<option value="42">42</option>\n<option value="43">43</option>\n<option value="44">44</option>\n<option value="45">45</option>\n<option value="46">46</option>\n<option value="47">47</option>\n<option value="48">48</option>\n<option value="49">49</option>\n<option value="50">50</option>\n<option value="51">51</option>\n<option value="52">52</option>\n<option value="53">53</option>\n<option value="54">54</option>\n<option value="55">55</option>\n<option value="56">56</option>\n<option value="57">57</option>\n<option value="58">58</option>\n<option value="59">59</option>\n)
    expected << "</select>\n"

@@ -745,7 +745,7 @@ def test_select_minute_with_generic_with_css_classes
  end

  def test_select_minute_with_custom_with_css_classes
-    expected = %(<select id="date_minute" name="date[minute]" class="my-minute">\n)
+    expected = %(<select id="date_minute" name="date[minute]" class="my-minute">\n).dup
    expected << %(<option value="00">00</option>\n<option value="01">01</option>\n<option value="02">02</option>\n<option value="03">03</option>\n<option value="04" selected="selected">04</option>\n<option value="05">05</option>\n<option value="06">06</option>\n<option value="07">07</option>\n<option value="08">08</option>\n<option value="09">09</option>\n<option value="10">10</option>\n<option value="11">11</option>\n<option value="12">12</option>\n<option value="13">13</option>\n<option value="14">14</option>\n<option value="15">15</option>\n<option value="16">16</option>\n<option value="17">17</option>\n<option value="18">18</option>\n<option value="19">19</option>\n<option value="20">20</option>\n<option value="21">21</option>\n<option value="22">22</option>\n<option value="23">23</option>\n<option value="24">24</option>\n<option value="25">25</option>\n<option value="26">26</option>\n<option value="27">27</option>\n<option value="28">28</option>\n<option value="29">29</option>\n<option value="30">30</option>\n<option value="31">31</option>\n<option value="32">32</option>\n<option value="33">33</option>\n<option value="34">34</option>\n<option value="35">35</option>\n<option value="36">36</option>\n<option value="37">37</option>\n<option value="38">38</option>\n<option value="39">39</option>\n<option value="40">40</option>\n<option value="41">41</option>\n<option value="42">42</option>\n<option value="43">43</option>\n<option value="44">44</option>\n<option value="45">45</option>\n<option value="46">46</option>\n<option value="47">47</option>\n<option value="48">48</option>\n<option value="49">49</option>\n<option value="50">50</option>\n<option value="51">51</option>\n<option value="52">52</option>\n<option value="53">53</option>\n<option value="54">54</option>\n<option value="55">55</option>\n<option value="56">56</option>\n<option value="57">57</option>\n<option value="58">58</option>\n<option value="59">59</option>\n)
    expected << "</select>\n"

@@ -753,7 +753,7 @@ def test_select_minute_with_custom_with_css_classes
  end

  def test_select_second
-    expected = %(<select id="date_second" name="date[second]">\n)
+    expected = %(<select id="date_second" name="date[second]">\n).dup
    expected << %(<option value="00">00</option>\n<option value="01">01</option>\n<option value="02">02</option>\n<option value="03">03</option>\n<option value="04">04</option>\n<option value="05">05</option>\n<option value="06">06</option>\n<option value="07">07</option>\n<option value="08">08</option>\n<option value="09">09</option>\n<option value="10">10</option>\n<option value="11">11</option>\n<option value="12">12</option>\n<option value="13">13</option>\n<option value="14">14</option>\n<option value="15">15</option>\n<option value="16">16</option>\n<option value="17">17</option>\n<option value="18" selected="selected">18</option>\n<option value="19">19</option>\n<option value="20">20</option>\n<option value="21">21</option>\n<option value="22">22</option>\n<option value="23">23</option>\n<option value="24">24</option>\n<option value="25">25</option>\n<option value="26">26</option>\n<option value="27">27</option>\n<option value="28">28</option>\n<option value="29">29</option>\n<option value="30">30</option>\n<option value="31">31</option>\n<option value="32">32</option>\n<option value="33">33</option>\n<option value="34">34</option>\n<option value="35">35</option>\n<option value="36">36</option>\n<option value="37">37</option>\n<option value="38">38</option>\n<option value="39">39</option>\n<option value="40">40</option>\n<option value="41">41</option>\n<option value="42">42</option>\n<option value="43">43</option>\n<option value="44">44</option>\n<option value="45">45</option>\n<option value="46">46</option>\n<option value="47">47</option>\n<option value="48">48</option>\n<option value="49">49</option>\n<option value="50">50</option>\n<option value="51">51</option>\n<option value="52">52</option>\n<option value="53">53</option>\n<option value="54">54</option>\n<option value="55">55</option>\n<option value="56">56</option>\n<option value="57">57</option>\n<option value="58">58</option>\n<option value="59">59</option>\n)
    expected << "</select>\n"

@@ -761,7 +761,7 @@ def test_select_second
  end

  def test_select_second_with_disabled
-    expected = %(<select id="date_second" name="date[second]" disabled="disabled">\n)
+    expected = %(<select id="date_second" name="date[second]" disabled="disabled">\n).dup
    expected << %(<option value="00">00</option>\n<option value="01">01</option>\n<option value="02">02</option>\n<option value="03">03</option>\n<option value="04">04</option>\n<option value="05">05</option>\n<option value="06">06</option>\n<option value="07">07</option>\n<option value="08">08</option>\n<option value="09">09</option>\n<option value="10">10</option>\n<option value="11">11</option>\n<option value="12">12</option>\n<option value="13">13</option>\n<option value="14">14</option>\n<option value="15">15</option>\n<option value="16">16</option>\n<option value="17">17</option>\n<option value="18" selected="selected">18</option>\n<option value="19">19</option>\n<option value="20">20</option>\n<option value="21">21</option>\n<option value="22">22</option>\n<option value="23">23</option>\n<option value="24">24</option>\n<option value="25">25</option>\n<option value="26">26</option>\n<option value="27">27</option>\n<option value="28">28</option>\n<option value="29">29</option>\n<option value="30">30</option>\n<option value="31">31</option>\n<option value="32">32</option>\n<option value="33">33</option>\n<option value="34">34</option>\n<option value="35">35</option>\n<option value="36">36</option>\n<option value="37">37</option>\n<option value="38">38</option>\n<option value="39">39</option>\n<option value="40">40</option>\n<option value="41">41</option>\n<option value="42">42</option>\n<option value="43">43</option>\n<option value="44">44</option>\n<option value="45">45</option>\n<option value="46">46</option>\n<option value="47">47</option>\n<option value="48">48</option>\n<option value="49">49</option>\n<option value="50">50</option>\n<option value="51">51</option>\n<option value="52">52</option>\n<option value="53">53</option>\n<option value="54">54</option>\n<option value="55">55</option>\n<option value="56">56</option>\n<option value="57">57</option>\n<option value="58">58</option>\n<option value="59">59</option>\n)
    expected << "</select>\n"

@@ -769,7 +769,7 @@ def test_select_second_with_disabled
  end

  def test_select_second_with_field_name_override
-    expected = %(<select id="date_segundo" name="date[segundo]">\n)
+    expected = %(<select id="date_segundo" name="date[segundo]">\n).dup
    expected << %(<option value="00">00</option>\n<option value="01">01</option>\n<option value="02">02</option>\n<option value="03">03</option>\n<option value="04">04</option>\n<option value="05">05</option>\n<option value="06">06</option>\n<option value="07">07</option>\n<option value="08">08</option>\n<option value="09">09</option>\n<option value="10">10</option>\n<option value="11">11</option>\n<option value="12">12</option>\n<option value="13">13</option>\n<option value="14">14</option>\n<option value="15">15</option>\n<option value="16">16</option>\n<option value="17">17</option>\n<option value="18" selected="selected">18</option>\n<option value="19">19</option>\n<option value="20">20</option>\n<option value="21">21</option>\n<option value="22">22</option>\n<option value="23">23</option>\n<option value="24">24</option>\n<option value="25">25</option>\n<option value="26">26</option>\n<option value="27">27</option>\n<option value="28">28</option>\n<option value="29">29</option>\n<option value="30">30</option>\n<option value="31">31</option>\n<option value="32">32</option>\n<option value="33">33</option>\n<option value="34">34</option>\n<option value="35">35</option>\n<option value="36">36</option>\n<option value="37">37</option>\n<option value="38">38</option>\n<option value="39">39</option>\n<option value="40">40</option>\n<option value="41">41</option>\n<option value="42">42</option>\n<option value="43">43</option>\n<option value="44">44</option>\n<option value="45">45</option>\n<option value="46">46</option>\n<option value="47">47</option>\n<option value="48">48</option>\n<option value="49">49</option>\n<option value="50">50</option>\n<option value="51">51</option>\n<option value="52">52</option>\n<option value="53">53</option>\n<option value="54">54</option>\n<option value="55">55</option>\n<option value="56">56</option>\n<option value="57">57</option>\n<option value="58">58</option>\n<option value="59">59</option>\n)
    expected << "</select>\n"

@@ -777,7 +777,7 @@ def test_select_second_with_field_name_override
  end

  def test_select_second_with_blank
-    expected = %(<select id="date_second" name="date[second]">\n)
+    expected = %(<select id="date_second" name="date[second]">\n).dup
    expected << %(<option value=""></option>\n<option value="00">00</option>\n<option value="01">01</option>\n<option value="02">02</option>\n<option value="03">03</option>\n<option value="04">04</option>\n<option value="05">05</option>\n<option value="06">06</option>\n<option value="07">07</option>\n<option value="08">08</option>\n<option value="09">09</option>\n<option value="10">10</option>\n<option value="11">11</option>\n<option value="12">12</option>\n<option value="13">13</option>\n<option value="14">14</option>\n<option value="15">15</option>\n<option value="16">16</option>\n<option value="17">17</option>\n<option value="18" selected="selected">18</option>\n<option value="19">19</option>\n<option value="20">20</option>\n<option value="21">21</option>\n<option value="22">22</option>\n<option value="23">23</option>\n<option value="24">24</option>\n<option value="25">25</option>\n<option value="26">26</option>\n<option value="27">27</option>\n<option value="28">28</option>\n<option value="29">29</option>\n<option value="30">30</option>\n<option value="31">31</option>\n<option value="32">32</option>\n<option value="33">33</option>\n<option value="34">34</option>\n<option value="35">35</option>\n<option value="36">36</option>\n<option value="37">37</option>\n<option value="38">38</option>\n<option value="39">39</option>\n<option value="40">40</option>\n<option value="41">41</option>\n<option value="42">42</option>\n<option value="43">43</option>\n<option value="44">44</option>\n<option value="45">45</option>\n<option value="46">46</option>\n<option value="47">47</option>\n<option value="48">48</option>\n<option value="49">49</option>\n<option value="50">50</option>\n<option value="51">51</option>\n<option value="52">52</option>\n<option value="53">53</option>\n<option value="54">54</option>\n<option value="55">55</option>\n<option value="56">56</option>\n<option value="57">57</option>\n<option value="58">58</option>\n<option value="59">59</option>\n)
    expected << "</select>\n"

@@ -785,7 +785,7 @@ def test_select_second_with_blank
  end

  def test_select_second_nil_with_blank
-    expected = %(<select id="date_second" name="date[second]">\n)
+    expected = %(<select id="date_second" name="date[second]">\n).dup
    expected << %(<option value=""></option>\n<option value="00">00</option>\n<option value="01">01</option>\n<option value="02">02</option>\n<option value="03">03</option>\n<option value="04">04</option>\n<option value="05">05</option>\n<option value="06">06</option>\n<option value="07">07</option>\n<option value="08">08</option>\n<option value="09">09</option>\n<option value="10">10</option>\n<option value="11">11</option>\n<option value="12">12</option>\n<option value="13">13</option>\n<option value="14">14</option>\n<option value="15">15</option>\n<option value="16">16</option>\n<option value="17">17</option>\n<option value="18">18</option>\n<option value="19">19</option>\n<option value="20">20</option>\n<option value="21">21</option>\n<option value="22">22</option>\n<option value="23">23</option>\n<option value="24">24</option>\n<option value="25">25</option>\n<option value="26">26</option>\n<option value="27">27</option>\n<option value="28">28</option>\n<option value="29">29</option>\n<option value="30">30</option>\n<option value="31">31</option>\n<option value="32">32</option>\n<option value="33">33</option>\n<option value="34">34</option>\n<option value="35">35</option>\n<option value="36">36</option>\n<option value="37">37</option>\n<option value="38">38</option>\n<option value="39">39</option>\n<option value="40">40</option>\n<option value="41">41</option>\n<option value="42">42</option>\n<option value="43">43</option>\n<option value="44">44</option>\n<option value="45">45</option>\n<option value="46">46</option>\n<option value="47">47</option>\n<option value="48">48</option>\n<option value="49">49</option>\n<option value="50">50</option>\n<option value="51">51</option>\n<option value="52">52</option>\n<option value="53">53</option>\n<option value="54">54</option>\n<option value="55">55</option>\n<option value="56">56</option>\n<option value="57">57</option>\n<option value="58">58</option>\n<option value="59">59</option>\n)
    expected << "</select>\n"

@@ -793,7 +793,7 @@ def test_select_second_nil_with_blank
  end

  def test_select_second_with_html_options
-    expected = %(<select id="date_second" name="date[second]" class="selector" accesskey="M">\n)
+    expected = %(<select id="date_second" name="date[second]" class="selector" accesskey="M">\n).dup
    expected << %(<option value="00">00</option>\n<option value="01">01</option>\n<option value="02">02</option>\n<option value="03">03</option>\n<option value="04">04</option>\n<option value="05">05</option>\n<option value="06">06</option>\n<option value="07">07</option>\n<option value="08">08</option>\n<option value="09">09</option>\n<option value="10">10</option>\n<option value="11">11</option>\n<option value="12">12</option>\n<option value="13">13</option>\n<option value="14">14</option>\n<option value="15">15</option>\n<option value="16">16</option>\n<option value="17">17</option>\n<option value="18" selected="selected">18</option>\n<option value="19">19</option>\n<option value="20">20</option>\n<option value="21">21</option>\n<option value="22">22</option>\n<option value="23">23</option>\n<option value="24">24</option>\n<option value="25">25</option>\n<option value="26">26</option>\n<option value="27">27</option>\n<option value="28">28</option>\n<option value="29">29</option>\n<option value="30">30</option>\n<option value="31">31</option>\n<option value="32">32</option>\n<option value="33">33</option>\n<option value="34">34</option>\n<option value="35">35</option>\n<option value="36">36</option>\n<option value="37">37</option>\n<option value="38">38</option>\n<option value="39">39</option>\n<option value="40">40</option>\n<option value="41">41</option>\n<option value="42">42</option>\n<option value="43">43</option>\n<option value="44">44</option>\n<option value="45">45</option>\n<option value="46">46</option>\n<option value="47">47</option>\n<option value="48">48</option>\n<option value="49">49</option>\n<option value="50">50</option>\n<option value="51">51</option>\n<option value="52">52</option>\n<option value="53">53</option>\n<option value="54">54</option>\n<option value="55">55</option>\n<option value="56">56</option>\n<option value="57">57</option>\n<option value="58">58</option>\n<option value="59">59</option>\n)
    expected << "</select>\n"

@@ -801,7 +801,7 @@ def test_select_second_with_html_options
  end

  def test_select_second_with_default_prompt
-    expected = %(<select id="date_second" name="date[second]">\n)
+    expected = %(<select id="date_second" name="date[second]">\n).dup
    expected << %(<option value="">Seconds</option>\n<option value="00">00</option>\n<option value="01">01</option>\n<option value="02">02</option>\n<option value="03">03</option>\n<option value="04">04</option>\n<option value="05">05</option>\n<option value="06">06</option>\n<option value="07">07</option>\n<option value="08">08</option>\n<option value="09">09</option>\n<option value="10">10</option>\n<option value="11">11</option>\n<option value="12">12</option>\n<option value="13">13</option>\n<option value="14">14</option>\n<option value="15">15</option>\n<option value="16">16</option>\n<option value="17">17</option>\n<option value="18" selected="selected">18</option>\n<option value="19">19</option>\n<option value="20">20</option>\n<option value="21">21</option>\n<option value="22">22</option>\n<option value="23">23</option>\n<option value="24">24</option>\n<option value="25">25</option>\n<option value="26">26</option>\n<option value="27">27</option>\n<option value="28">28</option>\n<option value="29">29</option>\n<option value="30">30</option>\n<option value="31">31</option>\n<option value="32">32</option>\n<option value="33">33</option>\n<option value="34">34</option>\n<option value="35">35</option>\n<option value="36">36</option>\n<option value="37">37</option>\n<option value="38">38</option>\n<option value="39">39</option>\n<option value="40">40</option>\n<option value="41">41</option>\n<option value="42">42</option>\n<option value="43">43</option>\n<option value="44">44</option>\n<option value="45">45</option>\n<option value="46">46</option>\n<option value="47">47</option>\n<option value="48">48</option>\n<option value="49">49</option>\n<option value="50">50</option>\n<option value="51">51</option>\n<option value="52">52</option>\n<option value="53">53</option>\n<option value="54">54</option>\n<option value="55">55</option>\n<option value="56">56</option>\n<option value="57">57</option>\n<option value="58">58</option>\n<option value="59">59</option>\n)
    expected << "</select>\n"

@@ -809,7 +809,7 @@ def test_select_second_with_default_prompt
  end

  def test_select_second_with_custom_prompt
-    expected = %(<select id="date_second" name="date[second]">\n)
+    expected = %(<select id="date_second" name="date[second]">\n).dup
    expected << %(<option value="">Choose seconds</option>\n<option value="00">00</option>\n<option value="01">01</option>\n<option value="02">02</option>\n<option value="03">03</option>\n<option value="04">04</option>\n<option value="05">05</option>\n<option value="06">06</option>\n<option value="07">07</option>\n<option value="08">08</option>\n<option value="09">09</option>\n<option value="10">10</option>\n<option value="11">11</option>\n<option value="12">12</option>\n<option value="13">13</option>\n<option value="14">14</option>\n<option value="15">15</option>\n<option value="16">16</option>\n<option value="17">17</option>\n<option value="18" selected="selected">18</option>\n<option value="19">19</option>\n<option value="20">20</option>\n<option value="21">21</option>\n<option value="22">22</option>\n<option value="23">23</option>\n<option value="24">24</option>\n<option value="25">25</option>\n<option value="26">26</option>\n<option value="27">27</option>\n<option value="28">28</option>\n<option value="29">29</option>\n<option value="30">30</option>\n<option value="31">31</option>\n<option value="32">32</option>\n<option value="33">33</option>\n<option value="34">34</option>\n<option value="35">35</option>\n<option value="36">36</option>\n<option value="37">37</option>\n<option value="38">38</option>\n<option value="39">39</option>\n<option value="40">40</option>\n<option value="41">41</option>\n<option value="42">42</option>\n<option value="43">43</option>\n<option value="44">44</option>\n<option value="45">45</option>\n<option value="46">46</option>\n<option value="47">47</option>\n<option value="48">48</option>\n<option value="49">49</option>\n<option value="50">50</option>\n<option value="51">51</option>\n<option value="52">52</option>\n<option value="53">53</option>\n<option value="54">54</option>\n<option value="55">55</option>\n<option value="56">56</option>\n<option value="57">57</option>\n<option value="58">58</option>\n<option value="59">59</option>\n)
    expected << "</select>\n"

@@ -817,7 +817,7 @@ def test_select_second_with_custom_prompt
  end

  def test_select_second_with_generic_with_css_classes
-    expected = %(<select id="date_second" name="date[second]" class="second">\n)
+    expected = %(<select id="date_second" name="date[second]" class="second">\n).dup
    expected << %(<option value="00">00</option>\n<option value="01">01</option>\n<option value="02">02</option>\n<option value="03">03</option>\n<option value="04">04</option>\n<option value="05">05</option>\n<option value="06">06</option>\n<option value="07">07</option>\n<option value="08">08</option>\n<option value="09">09</option>\n<option value="10">10</option>\n<option value="11">11</option>\n<option value="12">12</option>\n<option value="13">13</option>\n<option value="14">14</option>\n<option value="15">15</option>\n<option value="16">16</option>\n<option value="17">17</option>\n<option value="18" selected="selected">18</option>\n<option value="19">19</option>\n<option value="20">20</option>\n<option value="21">21</option>\n<option value="22">22</option>\n<option value="23">23</option>\n<option value="24">24</option>\n<option value="25">25</option>\n<option value="26">26</option>\n<option value="27">27</option>\n<option value="28">28</option>\n<option value="29">29</option>\n<option value="30">30</option>\n<option value="31">31</option>\n<option value="32">32</option>\n<option value="33">33</option>\n<option value="34">34</option>\n<option value="35">35</option>\n<option value="36">36</option>\n<option value="37">37</option>\n<option value="38">38</option>\n<option value="39">39</option>\n<option value="40">40</option>\n<option value="41">41</option>\n<option value="42">42</option>\n<option value="43">43</option>\n<option value="44">44</option>\n<option value="45">45</option>\n<option value="46">46</option>\n<option value="47">47</option>\n<option value="48">48</option>\n<option value="49">49</option>\n<option value="50">50</option>\n<option value="51">51</option>\n<option value="52">52</option>\n<option value="53">53</option>\n<option value="54">54</option>\n<option value="55">55</option>\n<option value="56">56</option>\n<option value="57">57</option>\n<option value="58">58</option>\n<option value="59">59</option>\n)
    expected << "</select>\n"

@@ -825,7 +825,7 @@ def test_select_second_with_generic_with_css_classes
  end

  def test_select_second_with_custom_with_css_classes
-    expected = %(<select id="date_second" name="date[second]" class="my-second">\n)
+    expected = %(<select id="date_second" name="date[second]" class="my-second">\n).dup
    expected << %(<option value="00">00</option>\n<option value="01">01</option>\n<option value="02">02</option>\n<option value="03">03</option>\n<option value="04">04</option>\n<option value="05">05</option>\n<option value="06">06</option>\n<option value="07">07</option>\n<option value="08">08</option>\n<option value="09">09</option>\n<option value="10">10</option>\n<option value="11">11</option>\n<option value="12">12</option>\n<option value="13">13</option>\n<option value="14">14</option>\n<option value="15">15</option>\n<option value="16">16</option>\n<option value="17">17</option>\n<option value="18" selected="selected">18</option>\n<option value="19">19</option>\n<option value="20">20</option>\n<option value="21">21</option>\n<option value="22">22</option>\n<option value="23">23</option>\n<option value="24">24</option>\n<option value="25">25</option>\n<option value="26">26</option>\n<option value="27">27</option>\n<option value="28">28</option>\n<option value="29">29</option>\n<option value="30">30</option>\n<option value="31">31</option>\n<option value="32">32</option>\n<option value="33">33</option>\n<option value="34">34</option>\n<option value="35">35</option>\n<option value="36">36</option>\n<option value="37">37</option>\n<option value="38">38</option>\n<option value="39">39</option>\n<option value="40">40</option>\n<option value="41">41</option>\n<option value="42">42</option>\n<option value="43">43</option>\n<option value="44">44</option>\n<option value="45">45</option>\n<option value="46">46</option>\n<option value="47">47</option>\n<option value="48">48</option>\n<option value="49">49</option>\n<option value="50">50</option>\n<option value="51">51</option>\n<option value="52">52</option>\n<option value="53">53</option>\n<option value="54">54</option>\n<option value="55">55</option>\n<option value="56">56</option>\n<option value="57">57</option>\n<option value="58">58</option>\n<option value="59">59</option>\n)
    expected << "</select>\n"

@@ -833,7 +833,7 @@ def test_select_second_with_custom_with_css_classes
  end

  def test_select_date
-    expected =  %(<select id="date_first_year" name="date[first][year]">\n)
+    expected =  %(<select id="date_first_year" name="date[first][year]">\n).dup
    expected << %(<option value="2003" selected="selected">2003</option>\n<option value="2004">2004</option>\n<option value="2005">2005</option>\n)
    expected << "</select>\n"

@@ -858,7 +858,7 @@ def test_select_date_can_have_more_then_1000_years_interval_if_forced_via_parame
  end

  def test_select_date_with_order
-    expected = %(<select id="date_first_month" name="date[first][month]">\n)
+    expected = %(<select id="date_first_month" name="date[first][month]">\n).dup
    expected << %(<option value="1">January</option>\n<option value="2">February</option>\n<option value="3">March</option>\n<option value="4">April</option>\n<option value="5">May</option>\n<option value="6">June</option>\n<option value="7">July</option>\n<option value="8" selected="selected">August</option>\n<option value="9">September</option>\n<option value="10">October</option>\n<option value="11">November</option>\n<option value="12">December</option>\n)
    expected << "</select>\n"

@@ -875,7 +875,7 @@ def test_select_date_with_order

  def test_select_date_with_incomplete_order
    # Since the order is incomplete nothing will be shown
-    expected = %(<input id="date_first_year" name="date[first][year]" type="hidden" value="2003" />\n)
+    expected = %(<input id="date_first_year" name="date[first][year]" type="hidden" value="2003" />\n).dup
    expected << %(<input id="date_first_month" name="date[first][month]" type="hidden" value="8" />\n)
    expected << %(<input id="date_first_day" name="date[first][day]" type="hidden" value="1" />\n)

@@ -883,7 +883,7 @@ def test_select_date_with_incomplete_order
  end

  def test_select_date_with_disabled
-    expected =  %(<select id="date_first_year" name="date[first][year]" disabled="disabled">\n)
+    expected =  %(<select id="date_first_year" name="date[first][year]" disabled="disabled">\n).dup
    expected << %(<option value="2003" selected="selected">2003</option>\n<option value="2004">2004</option>\n<option value="2005">2005</option>\n)
    expected << "</select>\n"

@@ -899,7 +899,7 @@ def test_select_date_with_disabled
  end

  def test_select_date_with_no_start_year
-    expected = %(<select id="date_first_year" name="date[first][year]">\n)
+    expected = %(<select id="date_first_year" name="date[first][year]">\n).dup
    (Date.today.year - 5).upto(Date.today.year + 1) do |y|
      if y == Date.today.year
        expected << %(<option value="#{y}" selected="selected">#{y}</option>\n)
@@ -923,7 +923,7 @@ def test_select_date_with_no_start_year
  end

  def test_select_date_with_no_end_year
-    expected = %(<select id="date_first_year" name="date[first][year]">\n)
+    expected = %(<select id="date_first_year" name="date[first][year]">\n).dup
    2003.upto(2008) do |y|
      if y == 2003
        expected << %(<option value="#{y}" selected="selected">#{y}</option>\n)
@@ -947,7 +947,7 @@ def test_select_date_with_no_end_year
  end

  def test_select_date_with_no_start_or_end_year
-    expected = %(<select id="date_first_year" name="date[first][year]">\n)
+    expected = %(<select id="date_first_year" name="date[first][year]">\n).dup
    (Date.today.year - 5).upto(Date.today.year + 5) do |y|
      if y == Date.today.year
        expected << %(<option value="#{y}" selected="selected">#{y}</option>\n)
@@ -971,7 +971,7 @@ def test_select_date_with_no_start_or_end_year
  end

  def test_select_date_with_zero_value
-    expected =  %(<select id="date_first_year" name="date[first][year]">\n)
+    expected =  %(<select id="date_first_year" name="date[first][year]">\n).dup
    expected << %(<option value="2003">2003</option>\n<option value="2004">2004</option>\n<option value="2005">2005</option>\n)
    expected << "</select>\n"

@@ -987,7 +987,7 @@ def test_select_date_with_zero_value
  end

  def test_select_date_with_zero_value_and_no_start_year
-    expected = %(<select id="date_first_year" name="date[first][year]">\n)
+    expected = %(<select id="date_first_year" name="date[first][year]">\n).dup
    (Date.today.year - 5).upto(Date.today.year + 1) { |y| expected << %(<option value="#{y}">#{y}</option>\n) }
    expected << "</select>\n"

@@ -1003,7 +1003,7 @@ def test_select_date_with_zero_value_and_no_start_year
  end

  def test_select_date_with_zero_value_and_no_end_year
-    expected =  %(<select id="date_first_year" name="date[first][year]">\n)
+    expected =  %(<select id="date_first_year" name="date[first][year]">\n).dup
    last_year = Time.now.year + 5
    2003.upto(last_year) { |y| expected << %(<option value="#{y}">#{y}</option>\n) }
    expected << "</select>\n"
@@ -1020,7 +1020,7 @@ def test_select_date_with_zero_value_and_no_end_year
  end

  def test_select_date_with_zero_value_and_no_start_and_end_year
-    expected = %(<select id="date_first_year" name="date[first][year]">\n)
+    expected = %(<select id="date_first_year" name="date[first][year]">\n).dup
    (Date.today.year - 5).upto(Date.today.year + 5) { |y| expected << %(<option value="#{y}">#{y}</option>\n) }
    expected << "</select>\n"

@@ -1036,7 +1036,7 @@ def test_select_date_with_zero_value_and_no_start_and_end_year
  end

  def test_select_date_with_nil_value_and_no_start_and_end_year
-    expected = %(<select id="date_first_year" name="date[first][year]">\n)
+    expected = %(<select id="date_first_year" name="date[first][year]">\n).dup
    (Date.today.year - 5).upto(Date.today.year + 5) { |y| expected << %(<option value="#{y}">#{y}</option>\n) }
    expected << "</select>\n"

@@ -1052,7 +1052,7 @@ def test_select_date_with_nil_value_and_no_start_and_end_year
  end

  def test_select_date_with_html_options
-    expected =  %(<select id="date_first_year" name="date[first][year]" class="selector">\n)
+    expected =  %(<select id="date_first_year" name="date[first][year]" class="selector">\n).dup
    expected << %(<option value="2003" selected="selected">2003</option>\n<option value="2004">2004</option>\n<option value="2005">2005</option>\n)
    expected << "</select>\n"

@@ -1068,7 +1068,7 @@ def test_select_date_with_html_options
  end

  def test_select_date_with_separator
-    expected =  %(<select id="date_first_year" name="date[first][year]">\n)
+    expected =  %(<select id="date_first_year" name="date[first][year]">\n).dup
    expected << %(<option value="2003" selected="selected">2003</option>\n<option value="2004">2004</option>\n<option value="2005">2005</option>\n)
    expected << "</select>\n"

@@ -1088,7 +1088,7 @@ def test_select_date_with_separator
  end

  def test_select_date_with_separator_and_discard_day
-    expected =  %(<select id="date_first_year" name="date[first][year]">\n)
+    expected =  %(<select id="date_first_year" name="date[first][year]">\n).dup
    expected << %(<option value="2003" selected="selected">2003</option>\n<option value="2004">2004</option>\n<option value="2005">2005</option>\n)
    expected << "</select>\n"

@@ -1104,7 +1104,7 @@ def test_select_date_with_separator_and_discard_day
  end

  def test_select_date_with_separator_discard_month_and_day
-    expected =  %(<select id="date_first_year" name="date[first][year]">\n)
+    expected =  %(<select id="date_first_year" name="date[first][year]">\n).dup
    expected << %(<option value="2003" selected="selected">2003</option>\n<option value="2004">2004</option>\n<option value="2005">2005</option>\n)
    expected << "</select>\n"

@@ -1115,7 +1115,7 @@ def test_select_date_with_separator_discard_month_and_day
  end

  def test_select_date_with_hidden
-    expected =  %(<input id="date_first_year" name="date[first][year]" type="hidden" value="2003"/>\n)
+    expected =  %(<input id="date_first_year" name="date[first][year]" type="hidden" value="2003"/>\n).dup
    expected << %(<input id="date_first_month" name="date[first][month]" type="hidden" value="8" />\n)
    expected << %(<input id="date_first_day" name="date[first][day]" type="hidden" value="16" />\n)

@@ -1124,7 +1124,7 @@ def test_select_date_with_hidden
  end

  def test_select_date_with_css_classes_option
-    expected =  %(<select id="date_first_year" name="date[first][year]" class="year">\n)
+    expected =  %(<select id="date_first_year" name="date[first][year]" class="year">\n).dup
    expected << %(<option value="2003" selected="selected">2003</option>\n<option value="2004">2004</option>\n<option value="2005">2005</option>\n)
    expected << "</select>\n"

@@ -1140,7 +1140,7 @@ def test_select_date_with_css_classes_option
  end

  def test_select_date_with_custom_with_css_classes
-    expected =  %(<select id="date_year" name="date[year]" class="my-year">\n)
+    expected =  %(<select id="date_year" name="date[year]" class="my-year">\n).dup
    expected << %(<option value="2003" selected="selected">2003</option>\n<option value="2004">2004</option>\n<option value="2005">2005</option>\n)
    expected << "</select>\n"

@@ -1156,7 +1156,7 @@ def test_select_date_with_custom_with_css_classes
  end

  def test_select_date_with_css_classes_option_and_html_class_option
-    expected =  %(<select id="date_first_year" name="date[first][year]" class="datetime optional year">\n)
+    expected =  %(<select id="date_first_year" name="date[first][year]" class="datetime optional year">\n).dup
    expected << %(<option value="2003" selected="selected">2003</option>\n<option value="2004">2004</option>\n<option value="2005">2005</option>\n)
    expected << "</select>\n"

@@ -1172,7 +1172,7 @@ def test_select_date_with_css_classes_option_and_html_class_option
  end

  def test_select_date_with_custom_with_css_classes_and_html_class_option
-    expected =  %(<select id="date_year" name="date[year]" class="date optional my-year">\n)
+    expected =  %(<select id="date_year" name="date[year]" class="date optional my-year">\n).dup
    expected << %(<option value="2003" selected="selected">2003</option>\n<option value="2004">2004</option>\n<option value="2005">2005</option>\n)
    expected << "</select>\n"

@@ -1188,7 +1188,7 @@ def test_select_date_with_custom_with_css_classes_and_html_class_option
  end

  def test_select_date_with_partial_with_css_classes_and_html_class_option
-    expected =  %(<select id="date_year" name="date[year]" class="date optional">\n)
+    expected =  %(<select id="date_year" name="date[year]" class="date optional">\n).dup
    expected << %(<option value="2003" selected="selected">2003</option>\n<option value="2004">2004</option>\n<option value="2005">2005</option>\n)
    expected << "</select>\n"

@@ -1204,7 +1204,7 @@ def test_select_date_with_partial_with_css_classes_and_html_class_option
  end

  def test_select_date_with_html_class_option
-    expected =  %(<select id="date_year" name="date[year]" class="date optional custom-grid">\n)
+    expected =  %(<select id="date_year" name="date[year]" class="date optional custom-grid">\n).dup
    expected << %(<option value="2003" selected="selected">2003</option>\n<option value="2004">2004</option>\n<option value="2005">2005</option>\n)
    expected << "</select>\n"

@@ -1220,7 +1220,7 @@ def test_select_date_with_html_class_option
  end

  def test_select_datetime
-    expected =  %(<select id="date_first_year" name="date[first][year]">\n)
+    expected =  %(<select id="date_first_year" name="date[first][year]">\n).dup
    expected << %(<option value="2003" selected="selected">2003</option>\n<option value="2004">2004</option>\n<option value="2005">2005</option>\n)
    expected << "</select>\n"

@@ -1248,7 +1248,7 @@ def test_select_datetime
  end

  def test_select_datetime_with_ampm
-    expected =  %(<select id="date_first_year" name="date[first][year]">\n)
+    expected =  %(<select id="date_first_year" name="date[first][year]">\n).dup
    expected << %(<option value="2003" selected="selected">2003</option>\n<option value="2004">2004</option>\n<option value="2005">2005</option>\n)
    expected << "</select>\n"

@@ -1276,7 +1276,7 @@ def test_select_datetime_with_ampm
  end

  def test_select_datetime_with_separators
-    expected =  %(<select id="date_first_year" name="date[first][year]">\n)
+    expected =  %(<select id="date_first_year" name="date[first][year]">\n).dup
    expected << %(<option value="2003" selected="selected">2003</option>\n<option value="2004">2004</option>\n<option value="2005">2005</option>\n)
    expected << "</select>\n"

@@ -1304,7 +1304,7 @@ def test_select_datetime_with_separators
  end

  def test_select_datetime_with_nil_value_and_no_start_and_end_year
-    expected = %(<select id="date_first_year" name="date[first][year]">\n)
+    expected = %(<select id="date_first_year" name="date[first][year]">\n).dup
    (Date.today.year - 5).upto(Date.today.year + 5) { |y| expected << %(<option value="#{y}">#{y}</option>\n) }
    expected << "</select>\n"

@@ -1332,7 +1332,7 @@ def test_select_datetime_with_nil_value_and_no_start_and_end_year
  end

  def test_select_datetime_with_html_options
-    expected =  %(<select id="date_first_year" name="date[first][year]" class="selector">\n)
+    expected =  %(<select id="date_first_year" name="date[first][year]" class="selector">\n).dup
    expected << %(<option value="2003" selected="selected">2003</option>\n<option value="2004">2004</option>\n<option value="2005">2005</option>\n)
    expected << "</select>\n"

@@ -1360,7 +1360,7 @@ def test_select_datetime_with_html_options
  end

  def test_select_datetime_with_all_separators
-    expected =  %(<select id="date_first_year" name="date[first][year]" class="selector">\n)
+    expected =  %(<select id="date_first_year" name="date[first][year]" class="selector">\n).dup
    expected << %(<option value="2003" selected="selected">2003</option>\n<option value="2004">2004</option>\n<option value="2005">2005</option>\n)
    expected << "</select>\n"

@@ -1396,7 +1396,7 @@ def test_select_datetime_should_work_with_date
  end

  def test_select_datetime_with_default_prompt
-    expected =  %(<select id="date_first_year" name="date[first][year]">\n)
+    expected =  %(<select id="date_first_year" name="date[first][year]">\n).dup
    expected << %(<option value="">Year</option>\n<option value="2003" selected="selected">2003</option>\n<option value="2004">2004</option>\n<option value="2005">2005</option>\n)
    expected << "</select>\n"

@@ -1425,7 +1425,7 @@ def test_select_datetime_with_default_prompt
  end

  def test_select_datetime_with_custom_prompt
-    expected =  %(<select id="date_first_year" name="date[first][year]">\n)
+    expected =  %(<select id="date_first_year" name="date[first][year]">\n).dup
    expected << %(<option value="">Choose year</option>\n<option value="2003" selected="selected">2003</option>\n<option value="2004">2004</option>\n<option value="2005">2005</option>\n)
    expected << "</select>\n"

@@ -1454,7 +1454,7 @@ def test_select_datetime_with_custom_prompt
  end

  def test_select_datetime_with_generic_with_css_classes
-    expected =  %(<select id="date_year" name="date[year]" class="year">\n)
+    expected =  %(<select id="date_year" name="date[year]" class="year">\n).dup
    expected << %(<option value="2003" selected="selected">2003</option>\n<option value="2004">2004</option>\n<option value="2005">2005</option>\n)
    expected << "</select>\n"

@@ -1482,7 +1482,7 @@ def test_select_datetime_with_generic_with_css_classes
  end

  def test_select_datetime_with_custom_with_css_classes
-    expected =  %(<select id="date_year" name="date[year]" class="my-year">\n)
+    expected =  %(<select id="date_year" name="date[year]" class="my-year">\n).dup
    expected << %(<option value="2003" selected="selected">2003</option>\n<option value="2004">2004</option>\n<option value="2005">2005</option>\n)
    expected << "</select>\n"

@@ -1510,7 +1510,7 @@ def test_select_datetime_with_custom_with_css_classes
  end

  def test_select_datetime_with_custom_hours
-    expected =  %(<select id="date_first_year" name="date[first][year]">\n)
+    expected =  %(<select id="date_first_year" name="date[first][year]">\n).dup
    expected << %(<option value="">Choose year</option>\n<option value="2003" selected="selected">2003</option>\n<option value="2004">2004</option>\n<option value="2005">2005</option>\n)
    expected << "</select>\n"

@@ -1539,7 +1539,7 @@ def test_select_datetime_with_custom_hours
  end

  def test_select_datetime_with_hidden
-    expected =  %(<input id="date_first_year" name="date[first][year]" type="hidden" value="2003" />\n)
+    expected =  %(<input id="date_first_year" name="date[first][year]" type="hidden" value="2003" />\n).dup
    expected << %(<input id="date_first_month" name="date[first][month]" type="hidden" value="8" />\n)
    expected << %(<input id="date_first_day" name="date[first][day]" type="hidden" value="16" />\n)
    expected << %(<input id="date_first_hour" name="date[first][hour]" type="hidden" value="8" />\n)
@@ -1551,7 +1551,7 @@ def test_select_datetime_with_hidden
  end

  def test_select_time
-    expected = %(<input name="date[year]" id="date_year" value="2003" type="hidden" />\n)
+    expected = %(<input name="date[year]" id="date_year" value="2003" type="hidden" />\n).dup
    expected << %(<input name="date[month]" id="date_month" value="8" type="hidden" />\n)
    expected << %(<input name="date[day]" id="date_day" value="16" type="hidden" />\n)

@@ -1570,7 +1570,7 @@ def test_select_time
  end

  def test_select_time_with_ampm
-    expected = %(<input name="date[year]" id="date_year" value="2003" type="hidden" />\n)
+    expected = %(<input name="date[year]" id="date_year" value="2003" type="hidden" />\n).dup
    expected << %(<input name="date[month]" id="date_month" value="8" type="hidden" />\n)
    expected << %(<input name="date[day]" id="date_day" value="16" type="hidden" />\n)

@@ -1588,7 +1588,7 @@ def test_select_time_with_ampm
  end

  def test_select_time_with_separator
-    expected = %(<input name="date[year]" id="date_year" value="2003" type="hidden" />\n)
+    expected = %(<input name="date[year]" id="date_year" value="2003" type="hidden" />\n).dup
    expected << %(<input name="date[month]" id="date_month" value="8" type="hidden" />\n)
    expected << %(<input name="date[day]" id="date_day" value="16" type="hidden" />\n)
    expected << %(<select id="date_hour" name="date[hour]">\n)
@@ -1606,7 +1606,7 @@ def test_select_time_with_separator
  end

  def test_select_time_with_seconds
-    expected = %(<input name="date[year]" id="date_year" value="2003" type="hidden" />\n)
+    expected = %(<input name="date[year]" id="date_year" value="2003" type="hidden" />\n).dup
    expected << %(<input name="date[month]" id="date_month" value="8" type="hidden" />\n)
    expected << %(<input name="date[day]" id="date_day" value="16" type="hidden" />\n)

@@ -1630,7 +1630,7 @@ def test_select_time_with_seconds
  end

  def test_select_time_with_seconds_and_separator
-    expected = %(<input name="date[year]" id="date_year" value="2003" type="hidden" />\n)
+    expected = %(<input name="date[year]" id="date_year" value="2003" type="hidden" />\n).dup
    expected << %(<input name="date[month]" id="date_month" value="8" type="hidden" />\n)
    expected << %(<input name="date[day]" id="date_day" value="16" type="hidden" />\n)

@@ -1654,7 +1654,7 @@ def test_select_time_with_seconds_and_separator
  end

  def test_select_time_with_html_options
-    expected = %(<input name="date[year]" id="date_year" value="2003" type="hidden" />\n)
+    expected = %(<input name="date[year]" id="date_year" value="2003" type="hidden" />\n).dup
    expected << %(<input name="date[month]" id="date_month" value="8" type="hidden" />\n)
    expected << %(<input name="date[day]" id="date_day" value="16" type="hidden" />\n)

@@ -1677,7 +1677,7 @@ def test_select_time_should_work_with_date
  end

  def test_select_time_with_default_prompt
-    expected = %(<input name="date[year]" id="date_year" value="2003" type="hidden" />\n)
+    expected = %(<input name="date[year]" id="date_year" value="2003" type="hidden" />\n).dup
    expected << %(<input name="date[month]" id="date_month" value="8" type="hidden" />\n)
    expected << %(<input name="date[day]" id="date_day" value="16" type="hidden" />\n)

@@ -1701,7 +1701,7 @@ def test_select_time_with_default_prompt
  end

  def test_select_time_with_custom_prompt
-    expected = %(<input name="date[year]" id="date_year" value="2003" type="hidden" />\n)
+    expected = %(<input name="date[year]" id="date_year" value="2003" type="hidden" />\n).dup
    expected << %(<input name="date[month]" id="date_month" value="8" type="hidden" />\n)
    expected << %(<input name="date[day]" id="date_day" value="16" type="hidden" />\n)

@@ -1726,7 +1726,7 @@ def test_select_time_with_custom_prompt
  end

  def test_select_time_with_generic_with_css_classes
-    expected = %(<input name="date[year]" id="date_year" value="2003" type="hidden" />\n)
+    expected = %(<input name="date[year]" id="date_year" value="2003" type="hidden" />\n).dup
    expected << %(<input name="date[month]" id="date_month" value="8" type="hidden" />\n)
    expected << %(<input name="date[day]" id="date_day" value="16" type="hidden" />\n)

@@ -1750,7 +1750,7 @@ def test_select_time_with_generic_with_css_classes
  end

  def test_select_time_with_custom_with_css_classes
-    expected = %(<input name="date[year]" id="date_year" value="2003" type="hidden" />\n)
+    expected = %(<input name="date[year]" id="date_year" value="2003" type="hidden" />\n).dup
    expected << %(<input name="date[month]" id="date_month" value="8" type="hidden" />\n)
    expected << %(<input name="date[day]" id="date_day" value="16" type="hidden" />\n)

@@ -1774,7 +1774,7 @@ def test_select_time_with_custom_with_css_classes
  end

  def test_select_time_with_hidden
-    expected =  %(<input id="date_first_year" name="date[first][year]" type="hidden" value="2003" />\n)
+    expected =  %(<input id="date_first_year" name="date[first][year]" type="hidden" value="2003" />\n).dup
    expected << %(<input id="date_first_month" name="date[first][month]" type="hidden" value="8" />\n)
    expected << %(<input id="date_first_day" name="date[first][day]" type="hidden" value="16" />\n)
    expected << %(<input id="date_first_hour" name="date[first][hour]" type="hidden" value="8" />\n)
@@ -1788,7 +1788,7 @@ def test_date_select
    @post = Post.new
    @post.written_on = Date.new(2004, 6, 15)

-    expected = %{<select id="post_written_on_1i" name="post[written_on(1i)]">\n}
+    expected = %{<select id="post_written_on_1i" name="post[written_on(1i)]">\n}.dup
    expected << %{<option value="1999">1999</option>\n<option value="2000">2000</option>\n<option value="2001">2001</option>\n<option value="2002">2002</option>\n<option value="2003">2003</option>\n<option value="2004" selected="selected">2004</option>\n<option value="2005">2005</option>\n<option value="2006">2006</option>\n<option value="2007">2007</option>\n<option value="2008">2008</option>\n<option value="2009">2009</option>\n}
    expected << "</select>\n"

@@ -1808,7 +1808,7 @@ def test_date_select_with_selected
    @post = Post.new
    @post.written_on = Date.new(2004, 6, 15)

-    expected = %{<select id="post_written_on_1i" name="post[written_on(1i)]">\n}
+    expected = %{<select id="post_written_on_1i" name="post[written_on(1i)]">\n}.dup
    expected << %{<option value="1999">1999</option>\n<option value="2000">2000</option>\n<option value="2001">2001</option>\n<option value="2002">2002</option>\n<option value="2003">2003</option>\n<option selected="selected" value="2004">2004</option>\n<option value="2005">2005</option>\n<option value="2006">2006</option>\n<option value="2007">2007</option>\n<option value="2008">2008</option>\n<option value="2009">2009</option>\n}
    expected << "</select>\n"

@@ -1828,7 +1828,7 @@ def test_date_select_with_selected_in_hash
    @post = Post.new
    @post.written_on = Date.new(2004, 6, 15)

-    expected = %{<select id="post_written_on_1i" name="post[written_on(1i)]">\n}
+    expected = %{<select id="post_written_on_1i" name="post[written_on(1i)]">\n}.dup
    expected << %{<option value="1999">1999</option>\n<option value="2000">2000</option>\n<option value="2001">2001</option>\n<option value="2002">2002</option>\n<option value="2003">2003</option>\n<option selected="selected" value="2004">2004</option>\n<option value="2005">2005</option>\n<option value="2006">2006</option>\n<option value="2007">2007</option>\n<option value="2008">2008</option>\n<option value="2009">2009</option>\n}
    expected << "</select>\n"

@@ -1866,7 +1866,7 @@ def test_date_select_without_day
    @post = Post.new
    @post.written_on = Date.new(2004, 6, 15)

-    expected = "<input type=\"hidden\" id=\"post_written_on_3i\" name=\"post[written_on(3i)]\" value=\"1\" />\n"
+    expected = "<input type=\"hidden\" id=\"post_written_on_3i\" name=\"post[written_on(3i)]\" value=\"1\" />\n".dup

    expected << %{<select id="post_written_on_2i" name="post[written_on(2i)]">\n}
    expected << %{<option value="1">January</option>\n<option value="2">February</option>\n<option value="3">March</option>\n<option value="4">April</option>\n<option value="5">May</option>\n<option value="6" selected="selected">June</option>\n<option value="7">July</option>\n<option value="8">August</option>\n<option value="9">September</option>\n<option value="10">October</option>\n<option value="11">November</option>\n<option value="12">December</option>\n}
@@ -1883,7 +1883,7 @@ def test_date_select_without_day_and_month
    @post = Post.new
    @post.written_on = Date.new(2004, 2, 29)

-    expected = "<input type=\"hidden\" id=\"post_written_on_2i\" name=\"post[written_on(2i)]\" value=\"2\" />\n"
+    expected = "<input type=\"hidden\" id=\"post_written_on_2i\" name=\"post[written_on(2i)]\" value=\"2\" />\n".dup
    expected << "<input type=\"hidden\" id=\"post_written_on_3i\" name=\"post[written_on(3i)]\" value=\"1\" />\n"

    expected << %{<select id="post_written_on_1i" name="post[written_on(1i)]">\n}
@@ -1897,7 +1897,7 @@ def test_date_select_without_day_with_separator
    @post = Post.new
    @post.written_on = Date.new(2004, 6, 15)

-    expected = "<input type=\"hidden\" id=\"post_written_on_3i\" name=\"post[written_on(3i)]\" value=\"1\" />\n"
+    expected = "<input type=\"hidden\" id=\"post_written_on_3i\" name=\"post[written_on(3i)]\" value=\"1\" />\n".dup

    expected << %{<select id="post_written_on_2i" name="post[written_on(2i)]">\n}
    expected << %{<option value="1">January</option>\n<option value="2">February</option>\n<option value="3">March</option>\n<option value="4">April</option>\n<option value="5">May</option>\n<option value="6" selected="selected">June</option>\n<option value="7">July</option>\n<option value="8">August</option>\n<option value="9">September</option>\n<option value="10">October</option>\n<option value="11">November</option>\n<option value="12">December</option>\n}
@@ -1916,7 +1916,7 @@ def test_date_select_without_day_and_with_disabled_html_option
    @post = Post.new
    @post.written_on = Date.new(2004, 6, 15)

-    expected = "<input type=\"hidden\" id=\"post_written_on_3i\" disabled=\"disabled\" name=\"post[written_on(3i)]\" value=\"1\" />\n"
+    expected = "<input type=\"hidden\" id=\"post_written_on_3i\" disabled=\"disabled\" name=\"post[written_on(3i)]\" value=\"1\" />\n".dup

    expected << %{<select id="post_written_on_2i" disabled="disabled" name="post[written_on(2i)]">\n}
    expected << %{<option value="1">January</option>\n<option value="2">February</option>\n<option value="3">March</option>\n<option value="4">April</option>\n<option value="5">May</option>\n<option value="6" selected="selected">June</option>\n<option value="7">July</option>\n<option value="8">August</option>\n<option value="9">September</option>\n<option value="10">October</option>\n<option value="11">November</option>\n<option value="12">December</option>\n}
@@ -1937,7 +1937,7 @@ def test_date_select_within_fields_for
      concat f.date_select(:written_on)
    end

-    expected = %{<select id="post_written_on_1i" name="post[written_on(1i)]">\n<option value="1999">1999</option>\n<option value="2000">2000</option>\n<option value="2001">2001</option>\n<option value="2002">2002</option>\n<option value="2003">2003</option>\n<option selected="selected" value="2004">2004</option>\n<option value="2005">2005</option>\n<option value="2006">2006</option>\n<option value="2007">2007</option>\n<option value="2008">2008</option>\n<option value="2009">2009</option>\n</select>\n}
+    expected = %{<select id="post_written_on_1i" name="post[written_on(1i)]">\n<option value="1999">1999</option>\n<option value="2000">2000</option>\n<option value="2001">2001</option>\n<option value="2002">2002</option>\n<option value="2003">2003</option>\n<option selected="selected" value="2004">2004</option>\n<option value="2005">2005</option>\n<option value="2006">2006</option>\n<option value="2007">2007</option>\n<option value="2008">2008</option>\n<option value="2009">2009</option>\n</select>\n}.dup
    expected << %{<select id="post_written_on_2i" name="post[written_on(2i)]">\n<option value="1">January</option>\n<option value="2">February</option>\n<option value="3">March</option>\n<option value="4">April</option>\n<option value="5">May</option>\n<option selected="selected" value="6">June</option>\n<option value="7">July</option>\n<option value="8">August</option>\n<option value="9">September</option>\n<option value="10">October</option>\n<option value="11">November</option>\n<option value="12">December</option>\n</select>\n}
    expected << %{<select id="post_written_on_3i" name="post[written_on(3i)]">\n<option value="1">1</option>\n<option value="2">2</option>\n<option value="3">3</option>\n<option value="4">4</option>\n<option value="5">5</option>\n<option value="6">6</option>\n<option value="7">7</option>\n<option value="8">8</option>\n<option value="9">9</option>\n<option value="10">10</option>\n<option value="11">11</option>\n<option value="12">12</option>\n<option value="13">13</option>\n<option value="14">14</option>\n<option selected="selected" value="15">15</option>\n<option value="16">16</option>\n<option value="17">17</option>\n<option value="18">18</option>\n<option value="19">19</option>\n<option value="20">20</option>\n<option value="21">21</option>\n<option value="22">22</option>\n<option value="23">23</option>\n<option value="24">24</option>\n<option value="25">25</option>\n<option value="26">26</option>\n<option value="27">27</option>\n<option value="28">28</option>\n<option value="29">29</option>\n<option value="30">30</option>\n<option value="31">31</option>\n</select>\n}

@@ -1953,7 +1953,7 @@ def test_date_select_within_fields_for_with_index
      concat f.date_select(:written_on)
    end

-    expected = %{<select id="post_#{id}_written_on_1i" name="post[#{id}][written_on(1i)]">\n<option value="1999">1999</option>\n<option value="2000">2000</option>\n<option value="2001">2001</option>\n<option value="2002">2002</option>\n<option value="2003">2003</option>\n<option selected="selected" value="2004">2004</option>\n<option value="2005">2005</option>\n<option value="2006">2006</option>\n<option value="2007">2007</option>\n<option value="2008">2008</option>\n<option value="2009">2009</option>\n</select>\n}
+    expected = %{<select id="post_#{id}_written_on_1i" name="post[#{id}][written_on(1i)]">\n<option value="1999">1999</option>\n<option value="2000">2000</option>\n<option value="2001">2001</option>\n<option value="2002">2002</option>\n<option value="2003">2003</option>\n<option selected="selected" value="2004">2004</option>\n<option value="2005">2005</option>\n<option value="2006">2006</option>\n<option value="2007">2007</option>\n<option value="2008">2008</option>\n<option value="2009">2009</option>\n</select>\n}.dup
    expected << %{<select id="post_#{id}_written_on_2i" name="post[#{id}][written_on(2i)]">\n<option value="1">January</option>\n<option value="2">February</option>\n<option value="3">March</option>\n<option value="4">April</option>\n<option value="5">May</option>\n<option selected="selected" value="6">June</option>\n<option value="7">July</option>\n<option value="8">August</option>\n<option value="9">September</option>\n<option value="10">October</option>\n<option value="11">November</option>\n<option value="12">December</option>\n</select>\n}
    expected << %{<select id="post_#{id}_written_on_3i" name="post[#{id}][written_on(3i)]">\n<option value="1">1</option>\n<option value="2">2</option>\n<option value="3">3</option>\n<option value="4">4</option>\n<option value="5">5</option>\n<option value="6">6</option>\n<option value="7">7</option>\n<option value="8">8</option>\n<option value="9">9</option>\n<option value="10">10</option>\n<option value="11">11</option>\n<option value="12">12</option>\n<option value="13">13</option>\n<option value="14">14</option>\n<option selected="selected" value="15">15</option>\n<option value="16">16</option>\n<option value="17">17</option>\n<option value="18">18</option>\n<option value="19">19</option>\n<option value="20">20</option>\n<option value="21">21</option>\n<option value="22">22</option>\n<option value="23">23</option>\n<option value="24">24</option>\n<option value="25">25</option>\n<option value="26">26</option>\n<option value="27">27</option>\n<option value="28">28</option>\n<option value="29">29</option>\n<option value="30">30</option>\n<option value="31">31</option>\n</select>\n}

@@ -1969,7 +1969,7 @@ def test_date_select_within_fields_for_with_blank_index
      concat f.date_select(:written_on)
    end

-    expected = %{<select id="post_#{id}_written_on_1i" name="post[#{id}][written_on(1i)]">\n<option value="1999">1999</option>\n<option value="2000">2000</option>\n<option value="2001">2001</option>\n<option value="2002">2002</option>\n<option value="2003">2003</option>\n<option selected="selected" value="2004">2004</option>\n<option value="2005">2005</option>\n<option value="2006">2006</option>\n<option value="2007">2007</option>\n<option value="2008">2008</option>\n<option value="2009">2009</option>\n</select>\n}
+    expected = %{<select id="post_#{id}_written_on_1i" name="post[#{id}][written_on(1i)]">\n<option value="1999">1999</option>\n<option value="2000">2000</option>\n<option value="2001">2001</option>\n<option value="2002">2002</option>\n<option value="2003">2003</option>\n<option selected="selected" value="2004">2004</option>\n<option value="2005">2005</option>\n<option value="2006">2006</option>\n<option value="2007">2007</option>\n<option value="2008">2008</option>\n<option value="2009">2009</option>\n</select>\n}.dup
    expected << %{<select id="post_#{id}_written_on_2i" name="post[#{id}][written_on(2i)]">\n<option value="1">January</option>\n<option value="2">February</option>\n<option value="3">March</option>\n<option value="4">April</option>\n<option value="5">May</option>\n<option selected="selected" value="6">June</option>\n<option value="7">July</option>\n<option value="8">August</option>\n<option value="9">September</option>\n<option value="10">October</option>\n<option value="11">November</option>\n<option value="12">December</option>\n</select>\n}
    expected << %{<select id="post_#{id}_written_on_3i" name="post[#{id}][written_on(3i)]">\n<option value="1">1</option>\n<option value="2">2</option>\n<option value="3">3</option>\n<option value="4">4</option>\n<option value="5">5</option>\n<option value="6">6</option>\n<option value="7">7</option>\n<option value="8">8</option>\n<option value="9">9</option>\n<option value="10">10</option>\n<option value="11">11</option>\n<option value="12">12</option>\n<option value="13">13</option>\n<option value="14">14</option>\n<option selected="selected" value="15">15</option>\n<option value="16">16</option>\n<option value="17">17</option>\n<option value="18">18</option>\n<option value="19">19</option>\n<option value="20">20</option>\n<option value="21">21</option>\n<option value="22">22</option>\n<option value="23">23</option>\n<option value="24">24</option>\n<option value="25">25</option>\n<option value="26">26</option>\n<option value="27">27</option>\n<option value="28">28</option>\n<option value="29">29</option>\n<option value="30">30</option>\n<option value="31">31</option>\n</select>\n}

@@ -1981,7 +1981,7 @@ def test_date_select_with_index
    @post.written_on = Date.new(2004, 6, 15)
    id = 456

-    expected = %{<select id="post_456_written_on_1i" name="post[#{id}][written_on(1i)]">\n}
+    expected = %{<select id="post_456_written_on_1i" name="post[#{id}][written_on(1i)]">\n}.dup
    expected << %{<option value="1999">1999</option>\n<option value="2000">2000</option>\n<option value="2001">2001</option>\n<option value="2002">2002</option>\n<option value="2003">2003</option>\n<option value="2004" selected="selected">2004</option>\n<option value="2005">2005</option>\n<option value="2006">2006</option>\n<option value="2007">2007</option>\n<option value="2008">2008</option>\n<option value="2009">2009</option>\n}
    expected << "</select>\n"

@@ -2001,7 +2001,7 @@ def test_date_select_with_auto_index
    @post.written_on = Date.new(2004, 6, 15)
    id = 123

-    expected = %{<select id="post_123_written_on_1i" name="post[#{id}][written_on(1i)]">\n}
+    expected = %{<select id="post_123_written_on_1i" name="post[#{id}][written_on(1i)]">\n}.dup
    expected << %{<option value="1999">1999</option>\n<option value="2000">2000</option>\n<option value="2001">2001</option>\n<option value="2002">2002</option>\n<option value="2003">2003</option>\n<option value="2004" selected="selected">2004</option>\n<option value="2005">2005</option>\n<option value="2006">2006</option>\n<option value="2007">2007</option>\n<option value="2008">2008</option>\n<option value="2009">2009</option>\n}
    expected << "</select>\n"

@@ -2020,7 +2020,7 @@ def test_date_select_with_different_order
    @post = Post.new
    @post.written_on = Date.new(2004, 6, 15)

-    expected = %{<select id="post_written_on_3i" name="post[written_on(3i)]">\n}
+    expected = %{<select id="post_written_on_3i" name="post[written_on(3i)]">\n}.dup
    1.upto(31) { |i| expected << %(<option value="#{i}"#{' selected="selected"' if i == 15}>#{i}</option>\n) }
    expected << "</select>\n"

@@ -2040,7 +2040,7 @@ def test_date_select_with_nil

    start_year = Time.now.year - 5
    end_year   = Time.now.year + 5
-    expected =   %{<select id="post_written_on_1i" name="post[written_on(1i)]">\n}
+    expected =   %{<select id="post_written_on_1i" name="post[written_on(1i)]">\n}.dup
    start_year.upto(end_year) { |i| expected << %(<option value="#{i}"#{' selected="selected"' if i == Time.now.year}>#{i}</option>\n) }
    expected << "</select>\n"

@@ -2060,7 +2060,7 @@ def test_date_select_with_nil_and_blank

    start_year = Time.now.year - 5
    end_year   = Time.now.year + 5
-    expected =   %{<select id="post_written_on_1i" name="post[written_on(1i)]">\n}
+    expected =   %{<select id="post_written_on_1i" name="post[written_on(1i)]">\n}.dup
    expected << "<option value=\"\"></option>\n"
    start_year.upto(end_year) { |i| expected << %(<option value="#{i}">#{i}</option>\n) }
    expected << "</select>\n"
@@ -2104,7 +2104,7 @@ def test_date_select_with_nil_and_blank_and_discard_month
    start_year = Time.now.year - 5
    end_year   = Time.now.year + 5

-    expected = %{<select id="post_written_on_1i" name="post[written_on(1i)]">\n}
+    expected = %{<select id="post_written_on_1i" name="post[written_on(1i)]">\n}.dup
    expected << "<option value=\"\"></option>\n"
    start_year.upto(end_year) { |i| expected << %(<option value="#{i}">#{i}</option>\n) }
    expected << "</select>\n"
@@ -2136,7 +2136,7 @@ def test_date_select_cant_override_discard_hour
    @post = Post.new
    @post.written_on = Date.new(2004, 6, 15)

-    expected = %{<select id="post_written_on_1i" name="post[written_on(1i)]">\n}
+    expected = %{<select id="post_written_on_1i" name="post[written_on(1i)]">\n}.dup
    expected << %{<option value="1999">1999</option>\n<option value="2000">2000</option>\n<option value="2001">2001</option>\n<option value="2002">2002</option>\n<option value="2003">2003</option>\n<option value="2004" selected="selected">2004</option>\n<option value="2005">2005</option>\n<option value="2006">2006</option>\n<option value="2007">2007</option>\n<option value="2008">2008</option>\n<option value="2009">2009</option>\n}
    expected << "</select>\n"

@@ -2155,7 +2155,7 @@ def test_date_select_with_html_options
    @post = Post.new
    @post.written_on = Date.new(2004, 6, 15)

-    expected = %{<select id="post_written_on_1i" name="post[written_on(1i)]" class="selector">\n}
+    expected = %{<select id="post_written_on_1i" name="post[written_on(1i)]" class="selector">\n}.dup
    expected << %{<option value="1999">1999</option>\n<option value="2000">2000</option>\n<option value="2001">2001</option>\n<option value="2002">2002</option>\n<option value="2003">2003</option>\n<option value="2004" selected="selected">2004</option>\n<option value="2005">2005</option>\n<option value="2006">2006</option>\n<option value="2007">2007</option>\n<option value="2008">2008</option>\n<option value="2009">2009</option>\n}
    expected << "</select>\n"

@@ -2179,7 +2179,7 @@ def test_date_select_with_html_options_within_fields_for
      concat f.date_select(:written_on, {}, class: "selector")
    end

-    expected = %{<select id="post_written_on_1i" name="post[written_on(1i)]" class="selector">\n}
+    expected = %{<select id="post_written_on_1i" name="post[written_on(1i)]" class="selector">\n}.dup
    expected << %{<option value="1999">1999</option>\n<option value="2000">2000</option>\n<option value="2001">2001</option>\n<option value="2002">2002</option>\n<option value="2003">2003</option>\n<option value="2004" selected="selected">2004</option>\n<option value="2005">2005</option>\n<option value="2006">2006</option>\n<option value="2007">2007</option>\n<option value="2008">2008</option>\n<option value="2009">2009</option>\n}
    expected << "</select>\n"

@@ -2199,7 +2199,7 @@ def test_date_select_with_separator
    @post = Post.new
    @post.written_on = Date.new(2004, 6, 15)

-    expected = %{<select id="post_written_on_1i" name="post[written_on(1i)]">\n}
+    expected = %{<select id="post_written_on_1i" name="post[written_on(1i)]">\n}.dup
    expected << %{<option value="1999">1999</option>\n<option value="2000">2000</option>\n<option value="2001">2001</option>\n<option value="2002">2002</option>\n<option value="2003">2003</option>\n<option value="2004" selected="selected">2004</option>\n<option value="2005">2005</option>\n<option value="2006">2006</option>\n<option value="2007">2007</option>\n<option value="2008">2008</option>\n<option value="2009">2009</option>\n}
    expected << "</select>\n"

@@ -2223,7 +2223,7 @@ def test_date_select_with_separator_and_order
    @post = Post.new
    @post.written_on = Date.new(2004, 6, 15)

-    expected = %{<select id="post_written_on_3i" name="post[written_on(3i)]">\n}
+    expected = %{<select id="post_written_on_3i" name="post[written_on(3i)]">\n}.dup
    expected << %{<option value="1">1</option>\n<option value="2">2</option>\n<option value="3">3</option>\n<option value="4">4</option>\n<option value="5">5</option>\n<option value="6">6</option>\n<option value="7">7</option>\n<option value="8">8</option>\n<option value="9">9</option>\n<option value="10">10</option>\n<option value="11">11</option>\n<option value="12">12</option>\n<option value="13">13</option>\n<option value="14">14</option>\n<option value="15" selected="selected">15</option>\n<option value="16">16</option>\n<option value="17">17</option>\n<option value="18">18</option>\n<option value="19">19</option>\n<option value="20">20</option>\n<option value="21">21</option>\n<option value="22">22</option>\n<option value="23">23</option>\n<option value="24">24</option>\n<option value="25">25</option>\n<option value="26">26</option>\n<option value="27">27</option>\n<option value="28">28</option>\n<option value="29">29</option>\n<option value="30">30</option>\n<option value="31">31</option>\n}
    expected << "</select>\n"

@@ -2246,7 +2246,7 @@ def test_date_select_with_separator_and_order_and_year_discarded
    @post = Post.new
    @post.written_on = Date.new(2004, 6, 15)

-    expected = %{<select id="post_written_on_3i" name="post[written_on(3i)]">\n}
+    expected = %{<select id="post_written_on_3i" name="post[written_on(3i)]">\n}.dup
    expected << %{<option value="1">1</option>\n<option value="2">2</option>\n<option value="3">3</option>\n<option value="4">4</option>\n<option value="5">5</option>\n<option value="6">6</option>\n<option value="7">7</option>\n<option value="8">8</option>\n<option value="9">9</option>\n<option value="10">10</option>\n<option value="11">11</option>\n<option value="12">12</option>\n<option value="13">13</option>\n<option value="14">14</option>\n<option value="15" selected="selected">15</option>\n<option value="16">16</option>\n<option value="17">17</option>\n<option value="18">18</option>\n<option value="19">19</option>\n<option value="20">20</option>\n<option value="21">21</option>\n<option value="22">22</option>\n<option value="23">23</option>\n<option value="24">24</option>\n<option value="25">25</option>\n<option value="26">26</option>\n<option value="27">27</option>\n<option value="28">28</option>\n<option value="29">29</option>\n<option value="30">30</option>\n<option value="31">31</option>\n}
    expected << "</select>\n"

@@ -2264,7 +2264,7 @@ def test_date_select_with_default_prompt
    @post = Post.new
    @post.written_on = Date.new(2004, 6, 15)

-    expected = %{<select id="post_written_on_1i" name="post[written_on(1i)]">\n}
+    expected = %{<select id="post_written_on_1i" name="post[written_on(1i)]">\n}.dup
    expected << %{<option value="">Year</option>\n<option value="1999">1999</option>\n<option value="2000">2000</option>\n<option value="2001">2001</option>\n<option value="2002">2002</option>\n<option value="2003">2003</option>\n<option value="2004" selected="selected">2004</option>\n<option value="2005">2005</option>\n<option value="2006">2006</option>\n<option value="2007">2007</option>\n<option value="2008">2008</option>\n<option value="2009">2009</option>\n}
    expected << "</select>\n"

@@ -2284,7 +2284,7 @@ def test_date_select_with_custom_prompt
    @post = Post.new
    @post.written_on = Date.new(2004, 6, 15)

-    expected = %{<select id="post_written_on_1i" name="post[written_on(1i)]">\n}
+    expected = %{<select id="post_written_on_1i" name="post[written_on(1i)]">\n}.dup
    expected << %{<option value="">Choose year</option>\n<option value="1999">1999</option>\n<option value="2000">2000</option>\n<option value="2001">2001</option>\n<option value="2002">2002</option>\n<option value="2003">2003</option>\n<option value="2004" selected="selected">2004</option>\n<option value="2005">2005</option>\n<option value="2006">2006</option>\n<option value="2007">2007</option>\n<option value="2008">2008</option>\n<option value="2009">2009</option>\n}
    expected << "</select>\n"

@@ -2304,7 +2304,7 @@ def test_date_select_with_generic_with_css_classes
    @post = Post.new
    @post.written_on = Date.new(2004, 6, 15)

-    expected = %{<select id="post_written_on_1i" name="post[written_on(1i)]" class="year">\n}
+    expected = %{<select id="post_written_on_1i" name="post[written_on(1i)]" class="year">\n}.dup
    expected << %{<option value="1999">1999</option>\n<option value="2000">2000</option>\n<option value="2001">2001</option>\n<option value="2002">2002</option>\n<option value="2003">2003</option>\n<option value="2004" selected="selected">2004</option>\n<option value="2005">2005</option>\n<option value="2006">2006</option>\n<option value="2007">2007</option>\n<option value="2008">2008</option>\n<option value="2009">2009</option>\n}
    expected << "</select>\n"

@@ -2324,7 +2324,7 @@ def test_date_select_with_custom_with_css_classes
    @post = Post.new
    @post.written_on = Date.new(2004, 6, 15)

-    expected = %{<select id="post_written_on_1i" name="post[written_on(1i)]" class="my-year">\n}
+    expected = %{<select id="post_written_on_1i" name="post[written_on(1i)]" class="my-year">\n}.dup
    expected << %{<option value="1999">1999</option>\n<option value="2000">2000</option>\n<option value="2001">2001</option>\n<option value="2002">2002</option>\n<option value="2003">2003</option>\n<option value="2004" selected="selected">2004</option>\n<option value="2005">2005</option>\n<option value="2006">2006</option>\n<option value="2007">2007</option>\n<option value="2008">2008</option>\n<option value="2009">2009</option>\n}
    expected << "</select>\n"

@@ -2344,7 +2344,7 @@ def test_time_select
    @post = Post.new
    @post.written_on = Time.local(2004, 6, 15, 15, 16, 35)

-    expected = %{<input type="hidden" id="post_written_on_1i" name="post[written_on(1i)]" value="2004" />\n}
+    expected = %{<input type="hidden" id="post_written_on_1i" name="post[written_on(1i)]" value="2004" />\n}.dup
    expected << %{<input type="hidden" id="post_written_on_2i" name="post[written_on(2i)]" value="6" />\n}
    expected << %{<input type="hidden" id="post_written_on_3i" name="post[written_on(3i)]" value="15" />\n}

@@ -2363,7 +2363,7 @@ def test_time_select_with_selected
    @post = Post.new
    @post.written_on = Time.local(2004, 6, 15, 15, 16, 35)

-    expected = %{<input type="hidden" id="post_written_on_1i" name="post[written_on(1i)]" value="2004" />\n}
+    expected = %{<input type="hidden" id="post_written_on_1i" name="post[written_on(1i)]" value="2004" />\n}.dup
    expected << %{<input type="hidden" id="post_written_on_2i" name="post[written_on(2i)]" value="6" />\n}
    expected << %{<input type="hidden" id="post_written_on_3i" name="post[written_on(3i)]" value="15" />\n}

@@ -2382,7 +2382,7 @@ def test_time_select_with_selected_nil
    @post = Post.new
    @post.written_on = Time.local(2004, 6, 15, 15, 16, 35)

-    expected = %{<input type="hidden" id="post_written_on_1i" name="post[written_on(1i)]" value="1" />\n}
+    expected = %{<input type="hidden" id="post_written_on_1i" name="post[written_on(1i)]" value="1" />\n}.dup
    expected << %{<input type="hidden" id="post_written_on_2i" name="post[written_on(2i)]" value="1" />\n}
    expected << %{<input type="hidden" id="post_written_on_3i" name="post[written_on(3i)]" value="1" />\n}

@@ -2401,7 +2401,7 @@ def test_time_select_without_date_hidden_fields
    @post = Post.new
    @post.written_on = Time.local(2004, 6, 15, 15, 16, 35)

-    expected = %(<select id="post_written_on_4i" name="post[written_on(4i)]">\n)
+    expected = %(<select id="post_written_on_4i" name="post[written_on(4i)]">\n).dup
    0.upto(23) { |i| expected << %(<option value="#{sprintf("%02d", i)}"#{' selected="selected"' if i == 15}>#{sprintf("%02d", i)}</option>\n) }
    expected << "</select>\n"
    expected << " : "
@@ -2416,7 +2416,7 @@ def test_time_select_with_seconds
    @post = Post.new
    @post.written_on = Time.local(2004, 6, 15, 15, 16, 35)

-    expected = %{<input type="hidden" id="post_written_on_1i" name="post[written_on(1i)]" value="2004" />\n}
+    expected = %{<input type="hidden" id="post_written_on_1i" name="post[written_on(1i)]" value="2004" />\n}.dup
    expected << %{<input type="hidden" id="post_written_on_2i" name="post[written_on(2i)]" value="6" />\n}
    expected << %{<input type="hidden" id="post_written_on_3i" name="post[written_on(3i)]" value="15" />\n}

@@ -2439,7 +2439,7 @@ def test_time_select_with_html_options
    @post = Post.new
    @post.written_on = Time.local(2004, 6, 15, 15, 16, 35)

-    expected = %{<input type="hidden" id="post_written_on_1i" name="post[written_on(1i)]" value="2004" />\n}
+    expected = %{<input type="hidden" id="post_written_on_1i" name="post[written_on(1i)]" value="2004" />\n}.dup
    expected << %{<input type="hidden" id="post_written_on_2i" name="post[written_on(2i)]" value="6" />\n}
    expected << %{<input type="hidden" id="post_written_on_3i" name="post[written_on(3i)]" value="15" />\n}

@@ -2462,7 +2462,7 @@ def test_time_select_with_html_options_within_fields_for
      concat f.time_select(:written_on, {}, class: "selector")
    end

-    expected = %{<input type="hidden" id="post_written_on_1i" name="post[written_on(1i)]" value="2004" />\n}
+    expected = %{<input type="hidden" id="post_written_on_1i" name="post[written_on(1i)]" value="2004" />\n}.dup
    expected << %{<input type="hidden" id="post_written_on_2i" name="post[written_on(2i)]" value="6" />\n}
    expected << %{<input type="hidden" id="post_written_on_3i" name="post[written_on(3i)]" value="15" />\n}

@@ -2481,7 +2481,7 @@ def test_time_select_with_separator
    @post = Post.new
    @post.written_on = Time.local(2004, 6, 15, 15, 16, 35)

-    expected = %{<input type="hidden" id="post_written_on_1i" name="post[written_on(1i)]" value="2004" />\n}
+    expected = %{<input type="hidden" id="post_written_on_1i" name="post[written_on(1i)]" value="2004" />\n}.dup
    expected << %{<input type="hidden" id="post_written_on_2i" name="post[written_on(2i)]" value="6" />\n}
    expected << %{<input type="hidden" id="post_written_on_3i" name="post[written_on(3i)]" value="15" />\n}

@@ -2508,7 +2508,7 @@ def test_time_select_with_default_prompt
    @post = Post.new
    @post.written_on = Time.local(2004, 6, 15, 15, 16, 35)

-    expected = %{<input type="hidden" id="post_written_on_1i" name="post[written_on(1i)]" value="2004" />\n}
+    expected = %{<input type="hidden" id="post_written_on_1i" name="post[written_on(1i)]" value="2004" />\n}.dup
    expected << %{<input type="hidden" id="post_written_on_2i" name="post[written_on(2i)]" value="6" />\n}
    expected << %{<input type="hidden" id="post_written_on_3i" name="post[written_on(3i)]" value="15" />\n}

@@ -2529,7 +2529,7 @@ def test_time_select_with_custom_prompt
    @post = Post.new
    @post.written_on = Time.local(2004, 6, 15, 15, 16, 35)

-    expected = %{<input type="hidden" id="post_written_on_1i" name="post[written_on(1i)]" value="2004" />\n}
+    expected = %{<input type="hidden" id="post_written_on_1i" name="post[written_on(1i)]" value="2004" />\n}.dup
    expected << %{<input type="hidden" id="post_written_on_2i" name="post[written_on(2i)]" value="6" />\n}
    expected << %{<input type="hidden" id="post_written_on_3i" name="post[written_on(3i)]" value="15" />\n}

@@ -2550,7 +2550,7 @@ def test_time_select_with_generic_with_css_classes
    @post = Post.new
    @post.written_on = Time.local(2004, 6, 15, 15, 16, 35)

-    expected = %{<input type="hidden" id="post_written_on_1i" name="post[written_on(1i)]" value="2004" />\n}
+    expected = %{<input type="hidden" id="post_written_on_1i" name="post[written_on(1i)]" value="2004" />\n}.dup
    expected << %{<input type="hidden" id="post_written_on_2i" name="post[written_on(2i)]" value="6" />\n}
    expected << %{<input type="hidden" id="post_written_on_3i" name="post[written_on(3i)]" value="15" />\n}

@@ -2571,7 +2571,7 @@ def test_time_select_with_custom_with_css_classes
    @post = Post.new
    @post.written_on = Time.local(2004, 6, 15, 15, 16, 35)

-    expected = %{<input type="hidden" id="post_written_on_1i" name="post[written_on(1i)]" value="2004" />\n}
+    expected = %{<input type="hidden" id="post_written_on_1i" name="post[written_on(1i)]" value="2004" />\n}.dup
    expected << %{<input type="hidden" id="post_written_on_2i" name="post[written_on(2i)]" value="6" />\n}
    expected << %{<input type="hidden" id="post_written_on_3i" name="post[written_on(3i)]" value="15" />\n}

@@ -2592,7 +2592,7 @@ def test_time_select_with_disabled_html_option
    @post = Post.new
    @post.written_on = Time.local(2004, 6, 15, 15, 16, 35)

-    expected = %{<input type="hidden" id="post_written_on_1i" disabled="disabled" name="post[written_on(1i)]" value="2004" />\n}
+    expected = %{<input type="hidden" id="post_written_on_1i" disabled="disabled" name="post[written_on(1i)]" value="2004" />\n}.dup
    expected << %{<input type="hidden" id="post_written_on_2i" disabled="disabled" name="post[written_on(2i)]" value="6" />\n}
    expected << %{<input type="hidden" id="post_written_on_3i" disabled="disabled" name="post[written_on(3i)]" value="15" />\n}

@@ -2611,7 +2611,7 @@ def test_datetime_select
    @post = Post.new
    @post.updated_at = Time.local(2004, 6, 15, 16, 35)

-    expected = %{<select id="post_updated_at_1i" name="post[updated_at(1i)]">\n}
+    expected = %{<select id="post_updated_at_1i" name="post[updated_at(1i)]">\n}.dup
    expected << %{<option value="1999">1999</option>\n<option value="2000">2000</option>\n<option value="2001">2001</option>\n<option value="2002">2002</option>\n<option value="2003">2003</option>\n<option value="2004" selected="selected">2004</option>\n<option value="2005">2005</option>\n<option value="2006">2006</option>\n<option value="2007">2007</option>\n<option value="2008">2008</option>\n<option value="2009">2009</option>\n}
    expected << "</select>\n"

@@ -2640,7 +2640,7 @@ def test_datetime_select_with_selected
    @post = Post.new
    @post.updated_at = Time.local(2004, 6, 15, 16, 35)

-    expected = %{<select id="post_updated_at_1i" name="post[updated_at(1i)]">\n}
+    expected = %{<select id="post_updated_at_1i" name="post[updated_at(1i)]">\n}.dup
    expected << %{<option value="1999">1999</option>\n<option value="2000">2000</option>\n<option value="2001">2001</option>\n<option value="2002">2002</option>\n<option value="2003">2003</option>\n<option value="2004" selected="selected">2004</option>\n<option value="2005">2005</option>\n<option value="2006">2006</option>\n<option value="2007">2007</option>\n<option value="2008">2008</option>\n<option value="2009">2009</option>\n}
    expected << "</select>\n"

@@ -2706,7 +2706,7 @@ def test_datetime_select_defaults_to_time_zone_now_when_config_time_zone_is_set

    @post = Post.new

-    expected = %{<select id="post_updated_at_1i" name="post[updated_at(1i)]">\n}
+    expected = %{<select id="post_updated_at_1i" name="post[updated_at(1i)]">\n}.dup
    expected << %{<option value="1999">1999</option>\n<option value="2000">2000</option>\n<option value="2001">2001</option>\n<option value="2002">2002</option>\n<option value="2003">2003</option>\n<option value="2004" selected="selected">2004</option>\n<option value="2005">2005</option>\n<option value="2006">2006</option>\n<option value="2007">2007</option>\n<option value="2008">2008</option>\n<option value="2009">2009</option>\n}
    expected << "</select>\n"

@@ -2741,7 +2741,7 @@ def test_datetime_select_with_html_options_within_fields_for
      concat f.datetime_select(:updated_at, {}, class: "selector")
    end

-    expected = %{<select id="post_updated_at_1i" name="post[updated_at(1i)]" class="selector">\n<option value="1999">1999</option>\n<option value="2000">2000</option>\n<option value="2001">2001</option>\n<option value="2002">2002</option>\n<option value="2003">2003</option>\n<option selected="selected" value="2004">2004</option>\n<option value="2005">2005</option>\n<option value="2006">2006</option>\n<option value="2007">2007</option>\n<option value="2008">2008</option>\n<option value="2009">2009</option>\n</select>\n}
+    expected = %{<select id="post_updated_at_1i" name="post[updated_at(1i)]" class="selector">\n<option value="1999">1999</option>\n<option value="2000">2000</option>\n<option value="2001">2001</option>\n<option value="2002">2002</option>\n<option value="2003">2003</option>\n<option selected="selected" value="2004">2004</option>\n<option value="2005">2005</option>\n<option value="2006">2006</option>\n<option value="2007">2007</option>\n<option value="2008">2008</option>\n<option value="2009">2009</option>\n</select>\n}.dup
    expected << %{<select id="post_updated_at_2i" name="post[updated_at(2i)]" class="selector">\n<option value="1">January</option>\n<option value="2">February</option>\n<option value="3">March</option>\n<option value="4">April</option>\n<option value="5">May</option>\n<option selected="selected" value="6">June</option>\n<option value="7">July</option>\n<option value="8">August</option>\n<option value="9">September</option>\n<option value="10">October</option>\n<option value="11">November</option>\n<option value="12">December</option>\n</select>\n}
    expected << %{<select id="post_updated_at_3i" name="post[updated_at(3i)]" class="selector">\n<option value="1">1</option>\n<option value="2">2</option>\n<option value="3">3</option>\n<option value="4">4</option>\n<option value="5">5</option>\n<option value="6">6</option>\n<option value="7">7</option>\n<option value="8">8</option>\n<option value="9">9</option>\n<option value="10">10</option>\n<option value="11">11</option>\n<option value="12">12</option>\n<option value="13">13</option>\n<option value="14">14</option>\n<option selected="selected" value="15">15</option>\n<option value="16">16</option>\n<option value="17">17</option>\n<option value="18">18</option>\n<option value="19">19</option>\n<option value="20">20</option>\n<option value="21">21</option>\n<option value="22">22</option>\n<option value="23">23</option>\n<option value="24">24</option>\n<option value="25">25</option>\n<option value="26">26</option>\n<option value="27">27</option>\n<option value="28">28</option>\n<option value="29">29</option>\n<option value="30">30</option>\n<option value="31">31</option>\n</select>\n}
    expected << %{ &mdash; <select id="post_updated_at_4i" name="post[updated_at(4i)]" class="selector">\n<option value="00">00</option>\n<option value="01">01</option>\n<option value="02">02</option>\n<option value="03">03</option>\n<option value="04">04</option>\n<option value="05">05</option>\n<option value="06">06</option>\n<option value="07">07</option>\n<option value="08">08</option>\n<option value="09">09</option>\n<option value="10">10</option>\n<option value="11">11</option>\n<option value="12">12</option>\n<option value="13">13</option>\n<option value="14">14</option>\n<option value="15">15</option>\n<option selected="selected" value="16">16</option>\n<option value="17">17</option>\n<option value="18">18</option>\n<option value="19">19</option>\n<option value="20">20</option>\n<option value="21">21</option>\n<option value="22">22</option>\n<option value="23">23</option>\n</select>\n}
@@ -2754,7 +2754,7 @@ def test_datetime_select_with_separators
    @post = Post.new
    @post.updated_at = Time.local(2004, 6, 15, 15, 16, 35)

-    expected = %{<select id="post_updated_at_1i" name="post[updated_at(1i)]">\n}
+    expected = %{<select id="post_updated_at_1i" name="post[updated_at(1i)]">\n}.dup
    expected << %{<option value="1999">1999</option>\n<option value="2000">2000</option>\n<option value="2001">2001</option>\n<option value="2002">2002</option>\n<option value="2003">2003</option>\n<option value="2004" selected="selected">2004</option>\n<option value="2005">2005</option>\n<option value="2006">2006</option>\n<option value="2007">2007</option>\n<option value="2008">2008</option>\n<option value="2009">2009</option>\n}
    expected << "</select>\n"

@@ -2807,7 +2807,7 @@ def test_datetime_select_with_default_prompt
    @post = Post.new
    @post.updated_at = nil

-    expected = %{<select id="post_updated_at_1i" name="post[updated_at(1i)]">\n}
+    expected = %{<select id="post_updated_at_1i" name="post[updated_at(1i)]">\n}.dup
    expected << %{<option value="">Year</option>\n<option value="1999">1999</option>\n<option value="2000">2000</option>\n<option value="2001">2001</option>\n<option value="2002">2002</option>\n<option value="2003">2003</option>\n<option value="2004">2004</option>\n<option value="2005">2005</option>\n<option value="2006">2006</option>\n<option value="2007">2007</option>\n<option value="2008">2008</option>\n<option value="2009">2009</option>\n}
    expected << "</select>\n"

@@ -2836,7 +2836,7 @@ def test_datetime_select_with_custom_prompt
    @post = Post.new
    @post.updated_at = nil

-    expected = %{<select id="post_updated_at_1i" name="post[updated_at(1i)]">\n}
+    expected = %{<select id="post_updated_at_1i" name="post[updated_at(1i)]">\n}.dup
    expected << %{<option value="">Choose year</option>\n<option value="1999">1999</option>\n<option value="2000">2000</option>\n<option value="2001">2001</option>\n<option value="2002">2002</option>\n<option value="2003">2003</option>\n<option value="2004">2004</option>\n<option value="2005">2005</option>\n<option value="2006">2006</option>\n<option value="2007">2007</option>\n<option value="2008">2008</option>\n<option value="2009">2009</option>\n}
    expected << "</select>\n"

@@ -2865,7 +2865,7 @@ def test_datetime_select_with_generic_with_css_classes
    @post = Post.new
    @post.written_on = Time.local(2004, 6, 15, 15, 16, 35)

-    expected = %{<select id="post_written_on_1i" name="post[written_on(1i)]" class="year">\n}
+    expected = %{<select id="post_written_on_1i" name="post[written_on(1i)]" class="year">\n}.dup
    expected << %{<option value="1999">1999</option>\n<option value="2000">2000</option>\n<option value="2001">2001</option>\n<option value="2002">2002</option>\n<option value="2003">2003</option>\n<option value="2004" selected="selected">2004</option>\n<option value="2005">2005</option>\n<option value="2006">2006</option>\n<option value="2007">2007</option>\n<option value="2008">2008</option>\n<option value="2009">2009</option>\n}
    expected << "</select>\n"

@@ -2894,7 +2894,7 @@ def test_datetime_select_with_custom_with_css_classes
    @post = Post.new
    @post.written_on = Time.local(2004, 6, 15, 15, 16, 35)

-    expected = %{<select id="post_written_on_1i" name="post[written_on(1i)]" class="my-year">\n}
+    expected = %{<select id="post_written_on_1i" name="post[written_on(1i)]" class="my-year">\n}.dup
    expected << %{<option value="1999">1999</option>\n<option value="2000">2000</option>\n<option value="2001">2001</option>\n<option value="2002">2002</option>\n<option value="2003">2003</option>\n<option value="2004" selected="selected">2004</option>\n<option value="2005">2005</option>\n<option value="2006">2006</option>\n<option value="2007">2007</option>\n<option value="2008">2008</option>\n<option value="2009">2009</option>\n}
    expected << "</select>\n"

@@ -2920,7 +2920,7 @@ def test_datetime_select_with_custom_with_css_classes
  end

  def test_date_select_with_zero_value_and_no_start_year
-    expected = %(<select id="date_first_year" name="date[first][year]">\n)
+    expected = %(<select id="date_first_year" name="date[first][year]">\n).dup
    (Date.today.year - 5).upto(Date.today.year + 1) { |y| expected << %(<option value="#{y}">#{y}</option>\n) }
    expected << "</select>\n"

@@ -2936,7 +2936,7 @@ def test_date_select_with_zero_value_and_no_start_year
  end

  def test_date_select_with_zero_value_and_no_end_year
-    expected =  %(<select id="date_first_year" name="date[first][year]">\n)
+    expected =  %(<select id="date_first_year" name="date[first][year]">\n).dup
    last_year = Time.now.year + 5
    2003.upto(last_year) { |y| expected << %(<option value="#{y}">#{y}</option>\n) }
    expected << "</select>\n"
@@ -2953,7 +2953,7 @@ def test_date_select_with_zero_value_and_no_end_year
  end

  def test_date_select_with_zero_value_and_no_start_and_end_year
-    expected = %(<select id="date_first_year" name="date[first][year]">\n)
+    expected = %(<select id="date_first_year" name="date[first][year]">\n).dup
    (Date.today.year - 5).upto(Date.today.year + 5) { |y| expected << %(<option value="#{y}">#{y}</option>\n) }
    expected << "</select>\n"

@@ -2969,7 +2969,7 @@ def test_date_select_with_zero_value_and_no_start_and_end_year
  end

  def test_date_select_with_nil_value_and_no_start_and_end_year
-    expected = %(<select id="date_first_year" name="date[first][year]">\n)
+    expected = %(<select id="date_first_year" name="date[first][year]">\n).dup
    (Date.today.year - 5).upto(Date.today.year + 5) { |y| expected << %(<option value="#{y}">#{y}</option>\n) }
    expected << "</select>\n"

@@ -2985,7 +2985,7 @@ def test_date_select_with_nil_value_and_no_start_and_end_year
  end

  def test_datetime_select_with_nil_value_and_no_start_and_end_year
-    expected = %(<select id="date_first_year" name="date[first][year]">\n)
+    expected = %(<select id="date_first_year" name="date[first][year]">\n).dup
    (Date.today.year - 5).upto(Date.today.year + 5) { |y| expected << %(<option value="#{y}">#{y}</option>\n) }
    expected << "</select>\n"

@@ -3017,7 +3017,7 @@ def test_datetime_select_with_options_index
    @post.updated_at = Time.local(2004, 6, 15, 16, 35)
    id = 456

-    expected = %{<select id="post_456_updated_at_1i" name="post[#{id}][updated_at(1i)]">\n}
+    expected = %{<select id="post_456_updated_at_1i" name="post[#{id}][updated_at(1i)]">\n}.dup
    expected << %{<option value="1999">1999</option>\n<option value="2000">2000</option>\n<option value="2001">2001</option>\n<option value="2002">2002</option>\n<option value="2003">2003</option>\n<option value="2004" selected="selected">2004</option>\n<option value="2005">2005</option>\n<option value="2006">2006</option>\n<option value="2007">2007</option>\n<option value="2008">2008</option>\n<option value="2009">2009</option>\n}
    expected << "</select>\n"

@@ -3051,7 +3051,7 @@ def test_datetime_select_within_fields_for_with_options_index
      concat f.datetime_select(:updated_at)
    end

-    expected = %{<select id="post_456_updated_at_1i" name="post[#{id}][updated_at(1i)]">\n}
+    expected = %{<select id="post_456_updated_at_1i" name="post[#{id}][updated_at(1i)]">\n}.dup
    expected << %{<option value="1999">1999</option>\n<option value="2000">2000</option>\n<option value="2001">2001</option>\n<option value="2002">2002</option>\n<option value="2003">2003</option>\n<option value="2004" selected="selected">2004</option>\n<option value="2005">2005</option>\n<option value="2006">2006</option>\n<option value="2007">2007</option>\n<option value="2008">2008</option>\n<option value="2009">2009</option>\n}
    expected << "</select>\n"

@@ -3081,7 +3081,7 @@ def test_datetime_select_with_auto_index
    @post.updated_at = Time.local(2004, 6, 15, 16, 35)
    id = @post.id

-    expected = %{<select id="post_123_updated_at_1i" name="post[#{id}][updated_at(1i)]">\n}
+    expected = %{<select id="post_123_updated_at_1i" name="post[#{id}][updated_at(1i)]">\n}.dup
    expected << %{<option value="1999">1999</option>\n<option value="2000">2000</option>\n<option value="2001">2001</option>\n<option value="2002">2002</option>\n<option value="2003">2003</option>\n<option value="2004" selected="selected">2004</option>\n<option value="2005">2005</option>\n<option value="2006">2006</option>\n<option value="2007">2007</option>\n<option value="2008">2008</option>\n<option value="2009">2009</option>\n}
    expected << "</select>\n"

@@ -3110,7 +3110,7 @@ def test_datetime_select_with_seconds
    @post = Post.new
    @post.updated_at = Time.local(2004, 6, 15, 15, 16, 35)

-    expected = %{<select id="post_updated_at_1i" name="post[updated_at(1i)]">\n}
+    expected = %{<select id="post_updated_at_1i" name="post[updated_at(1i)]">\n}.dup
    1999.upto(2009) { |i| expected << %(<option value="#{i}"#{' selected="selected"' if i == 2004}>#{i}</option>\n) }
    expected << "</select>\n"
    expected << %{<select id="post_updated_at_2i" name="post[updated_at(2i)]">\n}
@@ -3141,7 +3141,7 @@ def test_datetime_select_discard_year
    @post = Post.new
    @post.updated_at = Time.local(2004, 6, 15, 15, 16, 35)

-    expected = %{<input type="hidden" id="post_updated_at_1i" name="post[updated_at(1i)]" value="2004" />\n}
+    expected = %{<input type="hidden" id="post_updated_at_1i" name="post[updated_at(1i)]" value="2004" />\n}.dup
    expected << %{<select id="post_updated_at_2i" name="post[updated_at(2i)]">\n}
    1.upto(12) { |i| expected << %(<option value="#{i}"#{' selected="selected"' if i == 6}>#{Date::MONTHNAMES[i]}</option>\n) }
    expected << "</select>\n"
@@ -3166,7 +3166,7 @@ def test_datetime_select_discard_month
    @post = Post.new
    @post.updated_at = Time.local(2004, 6, 15, 15, 16, 35)

-    expected = %{<select id="post_updated_at_1i" name="post[updated_at(1i)]">\n}
+    expected = %{<select id="post_updated_at_1i" name="post[updated_at(1i)]">\n}.dup
    1999.upto(2009) { |i| expected << %(<option value="#{i}"#{' selected="selected"' if i == 2004}>#{i}</option>\n) }
    expected << "</select>\n"
    expected << %{<input type="hidden" id="post_updated_at_2i" name="post[updated_at(2i)]" value="6" />\n}
@@ -3189,7 +3189,7 @@ def test_datetime_select_discard_year_and_month
    @post = Post.new
    @post.updated_at = Time.local(2004, 6, 15, 15, 16, 35)

-    expected = %{<input type="hidden" id="post_updated_at_1i" name="post[updated_at(1i)]" value="2004" />\n}
+    expected = %{<input type="hidden" id="post_updated_at_1i" name="post[updated_at(1i)]" value="2004" />\n}.dup
    expected << %{<input type="hidden" id="post_updated_at_2i" name="post[updated_at(2i)]" value="6" />\n}
    expected << %{<input type="hidden" id="post_updated_at_3i" name="post[updated_at(3i)]" value="1" />\n}

@@ -3208,7 +3208,7 @@ def test_datetime_select_discard_year_and_month_with_disabled_html_option
    @post = Post.new
    @post.updated_at = Time.local(2004, 6, 15, 15, 16, 35)

-    expected = %{<input type="hidden" id="post_updated_at_1i" disabled="disabled" name="post[updated_at(1i)]" value="2004" />\n}
+    expected = %{<input type="hidden" id="post_updated_at_1i" disabled="disabled" name="post[updated_at(1i)]" value="2004" />\n}.dup
    expected << %{<input type="hidden" id="post_updated_at_2i" disabled="disabled" name="post[updated_at(2i)]" value="6" />\n}
    expected << %{<input type="hidden" id="post_updated_at_3i" disabled="disabled" name="post[updated_at(3i)]" value="1" />\n}

@@ -3227,7 +3227,7 @@ def test_datetime_select_discard_hour
    @post = Post.new
    @post.updated_at = Time.local(2004, 6, 15, 15, 16, 35)

-    expected = %{<select id="post_updated_at_1i" name="post[updated_at(1i)]">\n}
+    expected = %{<select id="post_updated_at_1i" name="post[updated_at(1i)]">\n}.dup
    1999.upto(2009) { |i| expected << %(<option value="#{i}"#{' selected="selected"' if i == 2004}>#{i}</option>\n) }
    expected << "</select>\n"
    expected << %{<select id="post_updated_at_2i" name="post[updated_at(2i)]">\n}
@@ -3244,7 +3244,7 @@ def test_datetime_select_discard_minute
    @post = Post.new
    @post.updated_at = Time.local(2004, 6, 15, 15, 16, 35)

-    expected = %{<select id="post_updated_at_1i" name="post[updated_at(1i)]">\n}
+    expected = %{<select id="post_updated_at_1i" name="post[updated_at(1i)]">\n}.dup
    1999.upto(2009) { |i| expected << %(<option value="#{i}"#{' selected="selected"' if i == 2004}>#{i}</option>\n) }
    expected << "</select>\n"
    expected << %{<select id="post_updated_at_2i" name="post[updated_at(2i)]">\n}
@@ -3268,7 +3268,7 @@ def test_datetime_select_disabled_and_discard_minute
    @post = Post.new
    @post.updated_at = Time.local(2004, 6, 15, 15, 16, 35)

-    expected = %{<select id="post_updated_at_1i" disabled="disabled" name="post[updated_at(1i)]">\n}
+    expected = %{<select id="post_updated_at_1i" disabled="disabled" name="post[updated_at(1i)]">\n}.dup
    1999.upto(2009) { |i| expected << %(<option value="#{i}"#{' selected="selected"' if i == 2004}>#{i}</option>\n) }
    expected << "</select>\n"
    expected << %{<select id="post_updated_at_2i" disabled="disabled" name="post[updated_at(2i)]">\n}
@@ -3292,7 +3292,7 @@ def test_datetime_select_invalid_order
    @post = Post.new
    @post.updated_at = Time.local(2004, 6, 15, 15, 16, 35)

-    expected = %{<select id="post_updated_at_3i" name="post[updated_at(3i)]">\n}
+    expected = %{<select id="post_updated_at_3i" name="post[updated_at(3i)]">\n}.dup
    1.upto(31) { |i| expected << %(<option value="#{i}"#{' selected="selected"' if i == 15}>#{i}</option>\n) }
    expected << "</select>\n"
    expected << %{<select id="post_updated_at_2i" name="post[updated_at(2i)]">\n}
@@ -3319,7 +3319,7 @@ def test_datetime_select_discard_with_order
    @post = Post.new
    @post.updated_at = Time.local(2004, 6, 15, 15, 16, 35)

-    expected = %{<input type="hidden" id="post_updated_at_1i" name="post[updated_at(1i)]" value="2004" />\n}
+    expected = %{<input type="hidden" id="post_updated_at_1i" name="post[updated_at(1i)]" value="2004" />\n}.dup
    expected << %{<select id="post_updated_at_3i" name="post[updated_at(3i)]">\n}
    1.upto(31) { |i| expected << %(<option value="#{i}"#{' selected="selected"' if i == 15}>#{i}</option>\n) }
    expected << "</select>\n"
@@ -3344,7 +3344,7 @@ def test_datetime_select_with_default_value_as_time
    @post = Post.new
    @post.updated_at = nil

-    expected = %{<select id="post_updated_at_1i" name="post[updated_at(1i)]">\n}
+    expected = %{<select id="post_updated_at_1i" name="post[updated_at(1i)]">\n}.dup
    2001.upto(2011) { |i| expected << %(<option value="#{i}"#{' selected="selected"' if i == 2006}>#{i}</option>\n) }
    expected << "</select>\n"
    expected << %{<select id="post_updated_at_2i" name="post[updated_at(2i)]">\n}
@@ -3371,7 +3371,7 @@ def test_include_blank_overrides_default_option
    @post = Post.new
    @post.updated_at = nil

-    expected = %{<select id="post_updated_at_1i" name="post[updated_at(1i)]">\n}
+    expected = %{<select id="post_updated_at_1i" name="post[updated_at(1i)]">\n}.dup
    expected << %(<option value=""></option>\n)
    (Time.now.year - 5).upto(Time.now.year + 5) { |i| expected << %(<option value="#{i}">#{i}</option>\n) }
    expected << "</select>\n"
@@ -3391,7 +3391,7 @@ def test_datetime_select_with_default_value_as_hash
    @post = Post.new
    @post.updated_at = nil

-    expected = %{<select id="post_updated_at_1i" name="post[updated_at(1i)]">\n}
+    expected = %{<select id="post_updated_at_1i" name="post[updated_at(1i)]">\n}.dup
    (Time.now.year - 5).upto(Time.now.year + 5) { |i| expected << %(<option value="#{i}"#{' selected="selected"' if i == Time.now.year}>#{i}</option>\n) }
    expected << "</select>\n"
    expected << %{<select id="post_updated_at_2i" name="post[updated_at(2i)]">\n}
@@ -3418,7 +3418,7 @@ def test_datetime_select_with_html_options
    @post = Post.new
    @post.updated_at = Time.local(2004, 6, 15, 16, 35)

-    expected = %{<select id="post_updated_at_1i" name="post[updated_at(1i)]" class="selector">\n}
+    expected = %{<select id="post_updated_at_1i" name="post[updated_at(1i)]" class="selector">\n}.dup
    expected << %{<option value="1999">1999</option>\n<option value="2000">2000</option>\n<option value="2001">2001</option>\n<option value="2002">2002</option>\n<option value="2003">2003</option>\n<option value="2004" selected="selected">2004</option>\n<option value="2005">2005</option>\n<option value="2006">2006</option>\n<option value="2007">2007</option>\n<option value="2008">2008</option>\n<option value="2009">2009</option>\n}
    expected << "</select>\n"


--- a/actionview/test/template/form_helper/form_with_test.rb
+++ b/actionview/test/template/form_helper/form_with_test.rb
@@ -16,7 +16,7 @@ def hidden_fields(options = {})
    method = options[:method]
    skip_enforcing_utf8 = options.fetch(:skip_enforcing_utf8, false)

-    "".tap do |txt|
+    "".dup.tap do |txt|
      unless skip_enforcing_utf8
        txt << %{<input name="utf8" type="hidden" value="&#x2713;" />}
      end
@@ -32,7 +32,7 @@ def form_text(action = "http://www.example.com", local: false, **options)

    method = method.to_s == "get" ? "get" : "post"

-    txt =  %{<form accept-charset="UTF-8" action="#{action}"}
+    txt =  %{<form accept-charset="UTF-8" action="#{action}"}.dup
    txt << %{ enctype="multipart/form-data"} if enctype
    txt << %{ data-remote="true"} unless local
    txt << %{ class="#{html_class}"} if html_class
@@ -2194,9 +2194,9 @@ def hidden_fields(options = {})
      method = options[:method]

      if options.fetch(:skip_enforcing_utf8, false)
-        txt = ""
+        txt = "".dup
      else
-        txt = %{<input name="utf8" type="hidden" value="&#x2713;" />}
+        txt = %{<input name="utf8" type="hidden" value="&#x2713;" />}.dup
      end

      if method && !%w(get post).include?(method.to_s)
@@ -2207,7 +2207,7 @@ def hidden_fields(options = {})
    end

    def form_text(action = "/", id = nil, html_class = nil, local = nil, multipart = nil, method = nil)
-      txt =  %{<form accept-charset="UTF-8" action="#{action}"}
+      txt =  %{<form accept-charset="UTF-8" action="#{action}"}.dup
      txt << %{ enctype="multipart/form-data"} if multipart
      txt << %{ data-remote="true"} unless local
      txt << %{ class="#{html_class}"} if html_class

--- a/actionview/test/template/form_helper_test.rb
+++ b/actionview/test/template/form_helper_test.rb
@@ -3446,9 +3446,9 @@ def hidden_fields(options = {})
      method = options[:method]

      if options.fetch(:enforce_utf8, true)
-        txt = %{<input name="utf8" type="hidden" value="&#x2713;" />}
+        txt = %{<input name="utf8" type="hidden" value="&#x2713;" />}.dup
      else
-        txt = ""
+        txt = "".dup
      end

      if method && !%w(get post).include?(method.to_s)
@@ -3459,7 +3459,7 @@ def hidden_fields(options = {})
    end

    def form_text(action = "/", id = nil, html_class = nil, remote = nil, multipart = nil, method = nil)
-      txt =  %{<form accept-charset="UTF-8" action="#{action}"}
+      txt =  %{<form accept-charset="UTF-8" action="#{action}"}.dup
      txt << %{ enctype="multipart/form-data"} if multipart
      txt << %{ data-remote="true"} if remote
      txt << %{ class="#{html_class}"} if html_class

--- a/actionview/test/template/form_tag_helper_test.rb
+++ b/actionview/test/template/form_tag_helper_test.rb
@@ -14,7 +14,7 @@ def hidden_fields(options = {})
    method = options[:method]
    enforce_utf8 = options.fetch(:enforce_utf8, true)

-    "".tap do |txt|
+    "".dup.tap do |txt|
      if enforce_utf8
        txt << %{<input name="utf8" type="hidden" value="&#x2713;" />}
      end
@@ -30,7 +30,7 @@ def form_text(action = "http://www.example.com", options = {})

    method = method.to_s == "get" ? "get" : "post"

-    txt =  %{<form accept-charset="UTF-8" action="#{action}"}
+    txt =  %{<form accept-charset="UTF-8" action="#{action}"}.dup
    txt << %{ enctype="multipart/form-data"} if enctype
    txt << %{ data-remote="true"} if remote
    txt << %{ class="#{html_class}"} if html_class

--- a/actionview/test/template/javascript_helper_test.rb
+++ b/actionview/test/template/javascript_helper_test.rb
@@ -20,8 +20,8 @@ def test_escape_javascript
    assert_equal %(This \\"thing\\" is really\\n netos\\'), escape_javascript(%(This "thing" is really\n netos'))
    assert_equal %(backslash\\\\test), escape_javascript(%(backslash\\test))
    assert_equal %(dont <\\/close> tags), escape_javascript(%(dont </close> tags))
-    assert_equal %(unicode &#x2028; newline), escape_javascript(%(unicode \342\200\250 newline).force_encoding(Encoding::UTF_8).encode!)
-    assert_equal %(unicode &#x2029; newline), escape_javascript(%(unicode \342\200\251 newline).force_encoding(Encoding::UTF_8).encode!)
+    assert_equal %(unicode &#x2028; newline), escape_javascript(%(unicode \342\200\250 newline).dup.force_encoding(Encoding::UTF_8).encode!)
+    assert_equal %(unicode &#x2029; newline), escape_javascript(%(unicode \342\200\251 newline).dup.force_encoding(Encoding::UTF_8).encode!)

    assert_equal %(dont <\\/close> tags), j(%(dont </close> tags))
  end

--- a/actionview/test/template/render_test.rb
+++ b/actionview/test/template/render_test.rb
@@ -439,7 +439,7 @@ def test_render_fallbacks_to_erb_for_unknown_types
  end

  CustomHandler = lambda do |template|
-    "@output_buffer = ''\n" \
+    "@output_buffer = ''.dup\n" \
      "@output_buffer << 'source: #{template.source.inspect}'\n"
  end

@@ -583,7 +583,7 @@ def test_render_layout_with_object

  def test_render_with_passing_couple_extensions_to_one_register_template_handler_function_call
    ActionView::Template.register_template_handler :foo1, :foo2, CustomHandler
-    assert_equal @view.render(inline: "Hello, World!", type: :foo1), @view.render(inline: "Hello, World!", type: :foo2)
+    assert_equal @view.render(inline: "Hello, World!".dup, type: :foo1), @view.render(inline: "Hello, World!".dup, type: :foo2)
  ensure
    ActionView::Template.unregister_template_handler :foo1, :foo2
  end

--- a/actionview/test/template/streaming_render_test.rb
+++ b/actionview/test/template/streaming_render_test.rb
@@ -17,7 +17,7 @@ def render_body(options)

  def buffered_render(options)
    body = render_body(options)
-    string = ""
+    string = "".dup
    body.each do |piece|
      string << piece
    end

--- a/actionview/test/template/template_test.rb
+++ b/actionview/test/template/template_test.rb
@@ -53,7 +53,7 @@ def my_buffer
  end

  def new_template(body = "<%= hello %>", details = { format: :html })
-    ActionView::Template.new(body, "hello template", details.fetch(:handler) { ERBHandler }, { virtual_path: "hello" }.merge!(details))
+    ActionView::Template.new(body.dup, "hello template", details.fetch(:handler) { ERBHandler }, { virtual_path: "hello" }.merge!(details))
  end

  def render(locals = {})

--- a/actionview/test/template/text_helper_test.rb
+++ b/actionview/test/template/text_helper_test.rb
@@ -11,7 +11,7 @@ def setup
  end

  def test_concat
-    self.output_buffer = "foo"
+    self.output_buffer = "foo".dup
    assert_equal "foobar", concat("bar")
    assert_equal "foobar", output_buffer
  end
@@ -104,8 +104,8 @@ def test_truncate_with_options_hash
  end

  def test_truncate_multibyte
-    assert_equal "\354\225\204\353\246\254\353\236\221 \354\225\204\353\246\254 ...".force_encoding(Encoding::UTF_8),
-      truncate("\354\225\204\353\246\254\353\236\221 \354\225\204\353\246\254 \354\225\204\353\235\274\353\246\254\354\230\244".force_encoding(Encoding::UTF_8), length: 10)
+    assert_equal "\354\225\204\353\246\254\353\236\221 \354\225\204\353\246\254 ...".dup.force_encoding(Encoding::UTF_8),
+      truncate("\354\225\204\353\246\254\353\236\221 \354\225\204\353\246\254 \354\225\204\353\235\274\353\246\254\354\230\244".dup.force_encoding(Encoding::UTF_8), length: 10)
  end

  def test_truncate_does_not_modify_the_options_hash
@@ -325,7 +325,7 @@ def test_excerpt_with_omission
  end

  def test_excerpt_with_utf8
-    assert_equal("...\357\254\203ciency could not be...".force_encoding(Encoding::UTF_8), excerpt("That's why e\357\254\203ciency could not be helped".force_encoding(Encoding::UTF_8), "could", radius: 8))
+    assert_equal("...\357\254\203ciency could not be...".dup.force_encoding(Encoding::UTF_8), excerpt("That's why e\357\254\203ciency could not be helped".dup.force_encoding(Encoding::UTF_8), "could", radius: 8))
  end

  def test_excerpt_does_not_modify_the_options_hash

--- a/actionview/test/template/url_helper_test.rb
+++ b/actionview/test/template/url_helper_test.rb
@@ -535,7 +535,7 @@ def test_current_page_with_escaped_params

  def test_current_page_with_escaped_params_with_different_encoding
    @request = request_for_url("/")
-    @request.stub(:path, "/category/administra%c3%a7%c3%a3o".force_encoding(Encoding::ASCII_8BIT)) do
+    @request.stub(:path, "/category/administra%c3%a7%c3%a3o".dup.force_encoding(Encoding::ASCII_8BIT)) do
      assert current_page?(controller: "foo", action: "category", category: "administração")
      assert current_page?("http://www.example.com/category/administra%c3%a7%c3%a3o")
    end