plugin=diff is not implemented.
http://yellow.ribbon.to/~tuotehhou/index.php?%2BSL%2BTargetNameProperty%E8%A7%A3%E6%B1%BA%E3%81%A7%E3%81%8D%E3%81%AA%E3%81%84%E3%82%A8%E3%83%A9%E3%83%BC
plugin=diff is not implemented.