SubmittingPatches: demonstrate using git-contacts with git-send-email

Signed-off-by: Linus Arver <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Documentation/SubmittingPatches

@@ -413,6 +413,13 @@ trial merges of your topic to `next` and `seen`, you may have noticed
 work by others conflicting with your changes.  There is a good possibility
 that these people may know the area you are touching well.
 
+If you are using `send-email`, you can feed it the output of `git contacts` like
+this:
+
+....
+	git send-email --cc-cmd='git contacts' feature/*.patch
+....
+
 :current-maintainer: footnote:[The current maintainer: [email protected]]
 :git-ml: footnote:[The mailing list: [email protected]]