TreeSize step doesn't work for me

[wolfgang]

I see the same as reported here:  http://osdir.com/ml/python.buildbot.devel/2006-11/msg00072.html

[warner]

hm, I must admit I've never actually used TreeSize?, and I suspect we don't have any test coverage for it, so it's probably bitrotted. If the new code in that message works, we should move that into the trunk.

It's also likely that I wrote TreeSize? in the way that I wanted it to work, without actually making sure that such an approach actually worked. Kind of like writing the user's manual first, then making the code match. The fact that it takes so much code to get a working version of TreeSize? strongly suggests that it's time we refactor the internals of ShellCommand? to make it easier.

[warner]

This should be fixed now, in [862b483787909844af93d032c72b98fa3a2de4f1].