Fixed documentation that made rdoc bark

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@8323 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

actionpack/lib/action_view/helpers/prototype_helper.rb

@@ -768,7 +768,7 @@ def replace_html(id, *options_for_render)
           #
           #   # Replace an existing person
           #
-          #   # Generates: Element.replace("person_45", "<!-- Contents of partial -->");
+          #   # Generates: Element.replace("person_45", "-- Contents of partial --");
           #   page.replace 'person_45', :partial => 'person', :object => @person
           #
           def replace(id, *options_for_render)