So instead of having to do this:

   @items.each do |item|
     content_tag_for(:li, item) do
        Title: <%= item.title %>
     end
   end

You can now do this:

   content_tag_for(:li, @items) do |item|
     Title: <%= item.title %>
   end

This reverts commit d20281ad.

Reason: This needs more investigation. Will apply when this is verified.

Updates to remove extra whitespaces and notably fix a whitespace issue with ajax_on_rails causing a code block not to render the entire block properly.

removed references to old remote_* helpers; add info about 3.1 adding multipart option to a form with file_field automatically

If passed "foo", a gem "foo-rails" is added to the Gemfile
and "foo" and "foo_ujs" are required in the application
JavaScript manifest.

Prototype and Scriptaculous are no longer vendored, but provided by prototype-rails from now on, also the -j option of the application generator is removed

No need to change this formatting.

This reverts commit 9c861e8a.

revises links to the API websites of individual components (no longer maintained), and rewrites the section about after and around filters in the controller guide

when 'form_for :resource, @resource ...' is found, remove the first argument (there is no need to use the :as option when the name is the same).

This reverts commit 7a6d8e4a.

Reason: The method that gives you a Ruby string with JSON source code is #to_json