stablerange: directly use 'self' when possible
Code movement introduced multiple silly case were we where accessing 'self'
though 'repo.stablerange' for no good reasons.
This software was downloaded from
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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>
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On Debian systems, the complete text of the GNU General Public License version
2 can be found in `/usr/share/common-licenses/GPL-2'.