[PATCH] format-patch: respect --stat when explicitly specified

[Leif Lindholm <leif.lindholm@linaro.org>]

Commit 43662b23abbd
("format-patch: keep cover-letter diffstat wrapped in 72 columns") made
format-patch keep the diffstat to within 72 characters. However, it does
this even when --stat is explicitly set on the command line.

Make it possible to explicitly override the new mechanism, using --stat,
matching the functionality before this change. This also matches the
output in the case of non-cover-letter files.

Cc: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Cc: Junio C Hamano <gitster@pobox.com>
Reported-by: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Leif Lindholm <leif.lindholm@linaro.org>
---

Note:
In TianoCore we have LotsOfGloriousFilesNamedInReallyLongCamelCase, so
our official submission guidelines specify the use of --stat.

 builtin/log.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/builtin/log.c b/builtin/log.c
index 061d4fd86..07e6ae2c1 100644
--- a/builtin/log.c
+++ b/builtin/log.c
@@ -1009,7 +1009,8 @@ static void show_diffstat(struct rev_info *rev,
 
 	memcpy(&opts, &rev->diffopt, sizeof(opts));
 	opts.output_format = DIFF_FORMAT_SUMMARY | DIFF_FORMAT_DIFFSTAT;
-	opts.stat_width = MAIL_DEFAULT_WRAP;
+	if (rev->diffopt.stat_width == -1)
+		opts.stat_width = MAIL_DEFAULT_WRAP;
 
 	diff_setup_done(&opts);
 
-- 
2.11.0