buildbot/buildbot — pull request #467 by benallard (2012-07-10 17:38:27+00:00)
Title: mercurial source step: don't update during pull, it will be done later on

update was at the wrong place, now, ``_cmd`` does the same in both branch of its ``if``.

Another stylish change has been done wrt ``if a: if b: else c else c`` corrected in ``if a and b: return; c``