SubmittingPatches: document how to reference previous commits

To reference previous commits people used to put just the abbreviated SHA-1 into commit messages. This is what has evolved as a more stable format for referencing commits. So lets document it for everyone to look-up when needed. Signed-off-by: Heiko Voigt <hvoigt@hvoigt.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>

Heiko Voigt committed Jul 28, 2016 at 14:55 UTC 175d38ca231d0dd9cca3bbebae40f797346a850d
1 file changed +5
Documentation/SubmittingPatches
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@@ -121,6 +121,11 @@ its behaviour. Try to make sure your explanation can be understood
121 without external resources. Instead of giving a URL to a mailing list
122 archive, summarize the relevant points of the discussion.
123
124 +If you want to reference a previous commit in the history of a stable
125 +branch use the format "abbreviated sha1 (subject, date)". So for example
126 +like this: "Commit f86a374 (pack-bitmap.c: fix a memleak, 2015-03-30)
127 +noticed [...]".
128 +
129
130 (3) Generate your patch using Git tools out of your commits.
131