Emacs chooses Bazaar

"arch/bazaar/bzr" is probably not the best way to think of them -- there are two completely
unrelated VCS designs, one called "arch" and "bazaar", and another called "bzr".  "bzr" is far
more closely related to mtn/hg/git than it is to "bazaar".

Yes, this is confusing.  For most purposes the best solution is to just forget "arch" and
"bazaar" ever existed, since they're now only of historical interest.