The following command used to fail because git shortlog has some witty magic to
decide the behaviour based on whether stdin is a terminal:
./gitstats /repo /dst < /dev/null
effectively causing a lot of shell scripts calling gitstats to fail with
"Division by zero" in author statistics.
Thanks-to: Bertrand Jacquin <beber@meleeweb.net>
Thanks-to: Sylvain Rabot <sylvain@abstraction.fr>