Martin von Zweigbergk <martinvonz@google.com> [Tue, 03 Dec 2019 09:43:10 -0800] rev 4981
compat: accept "success" argument to lock._afterlock callback
The callback gets a new "success" argument since Mercurial commit
888bd39ed555 (lock: pass "success" boolean to _afterlock callbacks,
2019-11-19).