plugin=diff is not implemented.
http://yellow.ribbon.to/~tuotehhou/index.php?%2BASP.NET%20MVC%2B%E3%83%97%E3%83%AD%E3%82%B8%E3%82%A7%E3%82%AF%E3%83%88%E3%81%AE%E6%A7%8B%E9%80%A0
plugin=diff is not implemented.