使用svn进行开发的过程中，每次提交前我都会使用svn diff查看一次本次提交的内容与版本库中的区别，但是svn diff默认的打印出俩的区别代码很乱，为了能够很好的进行代码对比，在.subversion/config中修改svn diff的执行命令，如下：
#!/bin/sh
# Configure your favorite diff program here.
DIFF="/etc/alternatives/vimdiff"
# Subversion provides the paths we need as the sixth and seventh
# parameters.
LEFT=${6}
RIGHT=${7}
# Call the diff command (change the following line to make sense for
# your merge program).
$DIFF $RIGHT $LEFT
# Return an errorcode of 0 if no differences were detected, 1 if some were.
# Any other errorcode will be treated as fatal.
以后，每次执行svn diff时就会去执行上面的脚步，非常方便进行代码检查。因为svn diff是对当前目录下的所有有变动的文件进行对比，如果文件太多，并且向中途退出，可以使用:diffoff(全部退出:diffoff!) 结束对比。
原文：http://www.cnblogs.com/cool-coder/p/4101874.html