evolve: don't crash on singled out revisions
Before this patch, we were crashing on unsolvable revisions when using
evolve --rev. This patch removes the crash and prints a warning when we
encounter such revision.
Pierre-Yves David <pierre-yves.david@fb.com> [Mon, 01 Jun 2015 10:58:50 -0700] rev 1353
test: adapt test to less frequent branch warning
The 701df761aa94 changeset in mercurial core made the branch warning issue only
for the first branch created. We adapt the tests to reflect this change.