dasherize the root element when doing to_xml

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@3901 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

activesupport/lib/active_support/core_ext/array/conversions.rb

@@ -38,7 +38,7 @@ def to_xml(options = {})
           children = options.delete(:children)
 
           options[:builder].instruct! unless options.delete(:skip_instruct)
-          options[:builder].tag!(root) { each { |e| e.to_xml(options.merge({ :skip_instruct => true, :root => children })) } }
+          options[:builder].tag!(root.to_s.dasherize) { each { |e| e.to_xml(options.merge({ :skip_instruct => true, :root => children })) } }
         end
       end
     end

activesupport/lib/active_support/core_ext/hash/conversions.rb

@@ -20,7 +20,7 @@ def to_xml(options = {})
           options.reverse_merge!({ :builder => Builder::XmlMarkup.new(:indent => options[:indent]), :root => "hash" })
           options[:builder].instruct! unless options.delete(:skip_instruct)
 
-          options[:builder].__send__(options[:root]) do
+          options[:builder].__send__(options[:root].to_s.dasherize) do
             for key in keys
               value = self[key]