[PATCH] test: remove dependency on $PYTHONDIR

[timeless]

Durham Goode <durham at fb.com> wrote:
> If we want to reduce the chance of needing to change globs in this test
> case, we could grep away most of the output, and only verify that a basic
> stack trace was produced (like only look for dispatch.run).

I want something that works for this too:
-  devel-warn: revset "oldstyle" use list instead of smartset,
(upgrade your code) at: $PYTHONDIR/mercurial/revset.py:* (mfunc)
(glob)

The regexp to reform PYTHONDIR worked pretty nicely.