Merge pull request #5766 from lest/patch-4

pass default value as argument to fetch

actionpack/lib/action_view/helpers/tags/base.rb

@@ -123,7 +123,7 @@ def select_content_tag(option_tags, options, html_options)
           add_default_name_and_id(html_options)
           select = content_tag("select", add_options(option_tags, options, value(object)), html_options)
 
-          if html_options["multiple"] && options.fetch(:include_hidden) { true }
+          if html_options["multiple"] && options.fetch(:include_hidden, true)
             tag("input", :disabled => html_options["disabled"], :name => html_options["name"], :type => "hidden", :value => "") + select
           else
             select