Fix conditional order broken in ea40ec5.

Author: kaspth

actionpack/lib/action_dispatch/testing/integration.rb

@@ -424,9 +424,9 @@ def initialize(mime_name, param_encoder, response_parser, url_encoded_form = fal
 
           def append_format_to(path)
             if @url_encoded_form
-              path + @path_format
-            else
               path
+            else
+              path + @path_format
             end
           end