tree a7f79460ed2f1fad1cd87694b9d80b23219eb669
parent 480c1ca6fd8df58a783e231648b489ed2bfd17f1
author Junio C Hamano <junkio@cox.net> 1158783716 -0700
committer Junio C Hamano <junkio@cox.net> 1158783716 -0700

git log: Unify header_filter and message_filter into one.

Now we can tell the built-in grep to grep only in head or in
body, use that to update --author, --committer, and --grep.

Unfortunately, to make --and, --not and other grep boolean
expressions useful, as in:

	# Things written by Junio committed and by Linus and log
	# does not talk about diff.

	git log --author=Junio --and --committer=Linus \
		--grep-not --grep=diff

we will need to do another round of built-in grep core
enhancement, because grep boolean expressions are designed to
work on one line at a time.

Signed-off-by: Junio C Hamano <junkio@cox.net>