grep: deprecates `--all` flag
As the name "all" is a misnomer for an option that searches on diffs of revisions,
we are moving to diff flag from all, deprecating it in the process.
Differential Revision: https://phab.mercurial-scm.org/D3825
from __future__ import absolute_importimport pkgutil__path__ = pkgutil.extend_path(__path__, __name__)