From: Jeff King <peff@peff.net>
Date: Fri, 2 Nov 2018 06:36:06 +0000 (-0400)
Subject: diff: avoid generating unused hunk header lines
X-Git-Tag: v2.20.0-rc0~33^2~6
X-Git-Url: https://git.lorimer.id.au/gitweb.git/diff_plain/3b40a090fd4e441e88897dfa96f50039952ed45b?ds=inline;hp=3b40a090fd4e441e88897dfa96f50039952ed45b

diff: avoid generating unused hunk header lines

Some callers of xdi_diff_outf() do not look at the generated hunk header
lines at all. By plugging in a no-op hunk callback, this tells xdiff not
to even bother formatting them.

This patch introduces a stock no-op callback and uses it with a few
callers whose line callbacks explicitly ignore hunk headers (because
they look only for +/- lines).

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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