Merge branch 'ma/skip-writing-unchanged-index'
authorJunio C Hamano <gitster@pobox.com>
Wed, 21 Mar 2018 18:30:10 +0000 (11:30 -0700)
committerJunio C Hamano <gitster@pobox.com>
Wed, 21 Mar 2018 18:30:10 +0000 (11:30 -0700)
Internal API clean-up to allow write_locked_index() optionally skip
writing the in-core index when it is not modified.

* ma/skip-writing-unchanged-index:
  write_locked_index(): add flag to avoid writing unchanged index


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