plugin=diff is not implemented.
http://yellow.ribbon.to/~tuotehhou/index.php?%2BSqlServer%2BRTRIM%E3%82%92%E7%94%A8%E3%81%84%E3%82%8B%E6%96%87%E5%AD%97%E5%88%97%E3%81%AE%E6%AF%94%E8%BC%83
plugin=diff is not implemented.