test: follow-up on
1c4d6ab2ecb8, stabilize test-remotefilelog-bgprefetch.t
In
1c4d6ab2ecb8, I've added some sleeps after about half of the calls to `hg
debugwaitonrepack` but it seems the other calls are also flaky as catched by
our CI: https://ci.octobus.net/job/MercurialPy2/299/console. Add sleeps after
all calls in order to be safe.
tests: add more wildcards to test-extdiff.t
This test has been flakey recently on Windows, but it appears to be the same
scenario as
88d4477ac4f6.