evolve: properly evolve stacked unstable with --rev
Before this patch, _singlesuccessor was not returning a revision number for
the case where the parent of the argument was not obsolete. This resulted in
bug when testing membership with the set of revisions. This patch fixes it and
adds a test.
This software was downloaded from
https://bitbucket.org/marmoute/mutable-history
Copyright 2011 Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
Logilab SA <contact@logilab.fr>
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
Patrick Mezard <patrick@mezard.eu>
This software may be used and distributed according to the terms of the GNU
General Public License version 2 or any later version.
On Debian systems, the complete text of the GNU General Public License version
2 can be found in `/usr/share/common-licenses/GPL-2'.