Use symbols for send and respond_to?.

Signed-off-by: NJeremy Kemper <jeremy@bitsweat.net>

actionpack/lib/action_view/helpers/active_record_helper.rb

@@ -246,7 +246,7 @@ def to_tag(options = {})
 
       alias_method :tag_without_error_wrapping, :tag
       def tag(name, options)
-        if object.respond_to?("errors") && object.errors.respond_to?("on")
+        if object.respond_to?(:errors) && object.errors.respond_to?(:on)
           error_wrapping(tag_without_error_wrapping(name, options), object.errors.on(@method_name))
         else
           tag_without_error_wrapping(name, options)
@@ -255,7 +255,7 @@ def tag(name, options)
 
       alias_method :content_tag_without_error_wrapping, :content_tag
       def content_tag(name, value, options)
-        if object.respond_to?("errors") && object.errors.respond_to?("on")
+        if object.respond_to?(:errors) && object.errors.respond_to?(:on)
           error_wrapping(content_tag_without_error_wrapping(name, value, options), object.errors.on(@method_name))
         else
           content_tag_without_error_wrapping(name, value, options)
@@ -264,7 +264,7 @@ def content_tag(name, value, options)
 
       alias_method :to_date_select_tag_without_error_wrapping, :to_date_select_tag
       def to_date_select_tag(options = {}, html_options = {})
-        if object.respond_to?("errors") && object.errors.respond_to?("on")
+        if object.respond_to?(:errors) && object.errors.respond_to?(:on)
           error_wrapping(to_date_select_tag_without_error_wrapping(options, html_options), object.errors.on(@method_name))
         else
           to_date_select_tag_without_error_wrapping(options, html_options)
@@ -273,7 +273,7 @@ def to_date_select_tag(options = {}, html_options = {})
 
       alias_method :to_datetime_select_tag_without_error_wrapping, :to_datetime_select_tag
       def to_datetime_select_tag(options = {}, html_options = {})
-        if object.respond_to?("errors") && object.errors.respond_to?("on")
+        if object.respond_to?(:errors) && object.errors.respond_to?(:on)
             error_wrapping(to_datetime_select_tag_without_error_wrapping(options, html_options), object.errors.on(@method_name))
           else
             to_datetime_select_tag_without_error_wrapping(options, html_options)
@@ -282,7 +282,7 @@ def to_datetime_select_tag(options = {}, html_options = {})
 
       alias_method :to_time_select_tag_without_error_wrapping, :to_time_select_tag
       def to_time_select_tag(options = {}, html_options = {})
-        if object.respond_to?("errors") && object.errors.respond_to?("on")
+        if object.respond_to?(:errors) && object.errors.respond_to?(:on)
           error_wrapping(to_time_select_tag_without_error_wrapping(options, html_options), object.errors.on(@method_name))
         else
           to_time_select_tag_without_error_wrapping(options, html_options)
@@ -298,7 +298,7 @@ def error_message
       end
 
       def column_type
-        object.send("column_for_attribute", @method_name).type
+        object.send(:column_for_attribute, @method_name).type
       end
     end
   end