Document debug-stack-line patterns


git-svn-id: http://es-lab.googlecode.com/svn/trunk@845 aeea10e6-ec39-11de-83d8-6d5adf01d787
less greedy


git-svn-id: http://es-lab.googlecode.com/svn/trunk@846 aeea10e6-ec39-11de-83d8-6d5adf01d787