topic: compat with tr.changes[b'phases'], it's now a list

8 jobs for topic/default/phases-revranges in 8 minutes and 13 seconds (queued for 1 second)
Status Name Job ID Coverage
  Test
passed doc #65098

00:00:25

passed flake8 #65092

00:00:34

manual pytype #65093
allowed to fail manual
passed tests-py2-cext #65420

00:03:12

passed tests-py2-pure #65095

00:03:12

passed tests-py3-cext #65096

00:05:00

passed tests-py3-pure #65097

00:03:07

passed tests-py2-cext #65094

00:04:55