evolve: don't use python sets on top of revset for evolve --rev
In --rev we were wrapping the revsets in python sets.
This is wrong as the use python sets force the wrapper revision set to be
computed earlier than it has to and have no order guarantee.
Removing this wrapping changes a test because the ordering does not appear to
be the same but the end result is the same.
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'.