Comment 30 for bug 854334

@Mystileef concerning #23 .... please don't hard-code bzr into scribes. There are many people who use something else than bzr (I would actually say most, but let's not start flamewar about it). I prefer git, others (see #28) Mercurial. If you would make it pluggable with reasonably simple and reasonably documented interface, I am willing to donate git plugin.