D7003: grep: put --diff in the first line of usage

Tue Oct 8 01:00:05 UTC 2019

marmoute added a comment.

  This does not seems to be the first line you are looking for. The first line we are looking for is the `usage:` line. It is defined lower in the decorator :

    _(b'[OPTION]... PATTERN [FILE]...'),

  We need to gain a `[--diff]` here.

REPOSITORY
  rHG Mercurial

CHANGES SINCE LAST ACTION
  https://phab.mercurial-scm.org/D7003/new/

REVISION DETAIL
  https://phab.mercurial-scm.org/D7003

To: navaneeth.suresh, #hg-reviewers
Cc: marmoute, mercurial-devel