Re: [PATCH] t3419-*.sh: Fix arithmetic expansion syntax error

Ramsay Jones [off-list ref] writes:

Note that this test is unique in having an '#!/bin/bash' line (rather
than '#!/bin/sh'),...

Thanks for spotting, and that is idiotic for us to have such a script.
We should fix the shebang line as well.

A quick git-grep shows that this is the only instance of this problem
(outside contrib/completion/git-completion.bash, that is).