Add render blank text, because rspec + 2.3 now requires a render or r…

…edirect (i.e. isolation mode is not working like it used to)

spec/controllers/default_rails_behaviour_spec.rb

@@ -5,13 +5,15 @@ class TheController < ActionController::Base
     def two_respond_tos
       respond_to {|f| f.html { first }}
       respond_to {|f| f.html { second }}
+      render :text => ""
     end
 
     def two_responses
       respond_to do |f|
         f.html { first }
         f.html { second }
       end
+      render :text => ""
     end
   end