render_for_text

# File actionpack/lib/action_controller/base.rb, line 1177
      def render_for_text(text = nil, status = nil, append_response = false) #:nodoc:
        @performed_render = true

        response.headers['Status'] = interpret_status(status || DEFAULT_RENDER_STATUS_CODE)

        if append_response
          response.body ||= ''
          response.body << text.to_s
        else
          response.body = case text
            when Proc then text
            when nil  then " " # Safari doesn't pass the headers of the return if the response is zero length
            else           text.to_s
          end
        end
      end