[PATCH] Render shorthands don't work with namespaced controllers

This ticket refers to trac ticket #9742 (I don't link in hope this ticket won't get marked as spam as before) and contains up-to-date patch.

This patch allows render shorthands (such as render :partial => @people) work properly in namespaced controllers.

Given a Nest::NestedController you can:

render :partial => @person

or

render :partial => @people

and expect the nest/people/_person to be used.