rails/rails — pull request #10883 by mtparet (2013-06-07 20:50:16+00:00)
Title: The default cache store is :file_store in caching_with_rails.textile

Fix https://github.com/rails/rails/issues/10873

Default cache store is :file_store, defined here https://github.com/rails/rails/blob/3-2-stable/railties/lib/rails/application/configuration.rb#L38