rust-filepatterns: improve API and robustness for pattern files parsing
Within the next few patches we will be using this new API.
Differential Revision: https://phab.mercurial-scm.org/D7908
Martin von Zweigbergk <martinvonz@google.com> [Mon, 10 Feb 2020 15:50:26 -0800] rev 44302
tests: add workaround for bzr bug
This started failing for me today. I guess my bzr was upgraded.
Differential Revision: https://phab.mercurial-scm.org/D8105