tests: stabilize test-rename-merge2.t on Windows
I have no idea why, but this shifted in b4057d001760.
Differential Revision: https://phab.mercurial-scm.org/D8146
--- a/tests/test-rename-merge2.t Mon Feb 24 13:50:55 2020 -0500
+++ b/tests/test-rename-merge2.t Mon Feb 24 16:59:35 2020 -0500
@@ -722,8 +722,8 @@
ancestor: 924404dff337, local: 0b76e65c8289+, remote: bdb19105162a
preserving b for resolve of b
preserving rev for resolve of rev
+ starting 4 threads for background file closing (?)
b: both renamed from a -> m (premerge)
- starting 4 threads for background file closing (?)
picked tool '* ../merge' for b (binary False symlink False changedelete False) (glob)
merging b
my b@0b76e65c8289+ other b@bdb19105162a ancestor a@924404dff337