Ian Moody <moz-ian@perix.co.uk> [Sat, 12 Oct 2019 14:41:59 +0100] rev 43259
phabricator: convert phabhunk and phabchange keys to bytes when finalising
I thought I had included this code already but I'd missed it out. One of the
disadvantages of attrs is that all the keys are unicode strings on py3, but we
need them to be byte strings.
Differential Revision: https://phab.mercurial-scm.org/D7066