* doc/contributing.texi (git send-email): Add install instructions.
Signed-off-by: Ludovic Courtès <ludo@gnu.org>
subsequent patches to @email{@var{NNN}@@debbugs.gnu.org} to make sure
they are kept together. See
@uref{https://debbugs.gnu.org/Advanced.html, the Debbugs documentation}
-for more information.
+for more information. You can install @command{git send-email} with
+@command{guix install git:send-email}.
@c Debbugs bug: https://debbugs.gnu.org/db/15/15361.html