t/README: justify why "! grep foo" is sufficient
commit53de742470bdf160a8412d7a2e9c30545db63fac
authorJunio C Hamano <gitster@pobox.com>
Mon, 24 Nov 2014 17:47:07 +0000 (24 09:47 -0800)
committerJunio C Hamano <gitster@pobox.com>
Mon, 24 Nov 2014 17:47:07 +0000 (24 09:47 -0800)
tree86c03526349868c80b53fd99f914bae7cc63c8fe
parent54cc5d29a0590c47c6f32d15c867c0199fdd672a
t/README: justify why "! grep foo" is sufficient

We require use of test_must_fail to check expected non-zero exit by
Git itself, but discourage test_must_fail to be used for checking
exit status of non Git commands that are supplied by the system.
The current text explains the reason for the former but not the
latter.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
t/README