[PATCH resend] SubmittingPatches: mention the git contacts command

[Thomas Gummerer <t.gummerer@gmail.com>]

Instead of just mentioning 'git blame' and 'git shortlog', which make it
quite hard for new contributors to pick out the appropriate list of
people to cc on their patch series, mention the 'git contacts' utility,
which makes it much easier to get a reasonable list of contacts for a
change.

This should help new contributors pick out a reasonable cc list by
simply using a single command.

Signed-off-by: Thomas Gummerer <t.gummerer@gmail.com>
---

I've originally sent this at <20180316213323.GC2224@hank>, during an
the rc period.  Eric had some comments, which I interpreted as being
okay with the change (hope I'm not mistaken there :)).  As I still
think this would be an improvement for new contributors, I'm resending
it here.

 Documentation/SubmittingPatches | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Documentation/SubmittingPatches b/Documentation/SubmittingPatches
index a1d0feca36..945f8edb46 100644
--- a/Documentation/SubmittingPatches
+++ b/Documentation/SubmittingPatches
@@ -260,8 +260,8 @@ that starts with `-----BEGIN PGP SIGNED MESSAGE-----`.  That is
 not a text/plain, it's something else.
 
 Send your patch with "To:" set to the mailing list, with "cc:" listing
-people who are involved in the area you are touching (the output from
-`git blame $path` and `git shortlog --no-merges $path` would help to
+people who are involved in the area you are touching (the `git
+contacts` command in `contrib/contacts/` can help to
 identify them), to solicit comments and reviews.
 
 :1: footnote:[The current maintainer: gitster@pobox.com]
-- 
2.16.2.804.g6dcf76e11