compat: fix use of repo.parents() to repo[None].parents() While using hgsubversion with the latest tip of core mercurial I saw this warning: (compatibility will be dropped after Mercurial-3.7, update your code.) at: /usr/lib/python2.6/site-packages/hgsubversion/wrappers.py:219 (push) searching for changes This patch fixes the issue and replaced the use of repo.parents() by repo[None].parents().