you know how often you need to create a patch when you’re a creative open source guy
here is the resoure: http://ariejan.net/2007/07/03/how-to-create-and-apply-a-patch-with-subversion/
1. create patch file using svn diff
svn diff > ~/fix_ugly_bug.diff
2. using the patch file to patch
patch -p0 -i ~/fix_ugly_bug.diff
