default_template_name

# File actionpack/lib/action_controller/base.rb, line 1248
      def default_template_name(action_name = self.action_name)
        if action_name
          action_name = action_name.to_s
          if action_name.include?('/') && template_path_includes_controller?(action_name)
            action_name = strip_out_controller(action_name)
          end
        end
        "#{self.class.controller_path}/#{action_name}"
      end