setup.py: fix version detection for tarball
- don't do version detection if there's no .hg directory
- shrink try: clause
- don't write __version__.py if version is unknown
(we might overwrite the real version)
adding a
% check custom patch options are honored
requesting all changes
adding changesets
adding manifests
adding file changes
added 1 changesets with 1 changes to 1 files
updating working directory
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
applying ../a.diff
Using custom patch
nothing changed