Merge branch 'ab/untracked-cache-invalidation-docs'
authorJunio C Hamano <gitster@pobox.com>
Tue, 27 Feb 2018 18:33:50 +0000 (10:33 -0800)
committerJunio C Hamano <gitster@pobox.com>
Tue, 27 Feb 2018 18:33:50 +0000 (10:33 -0800)
Doc update to warn against remaining bugs in untracked cache.

* ab/untracked-cache-invalidation-docs:
update-index doc: note the caveat with "could not open..."
update-index doc: note a fixed bug in the untracked cache

Trivial merge