[PATCH] ash: avoid GLIBC'ism %m

[Kang-Che Sung]

On Wed, Jul 19, 2017 at 2:11 AM, Markus Gothe <nietzsche at lysator.liu.se> wrote:
> Actually last time I checked ‘%m’ is POSIX contrary to glibc’s deprecated '%a’.
> However, I agree that it should not be used since at least uClibc can be built without support for it.

How come %m is POSIX when I didn't see any mention of it in this page?
http://pubs.opengroup.org/onlinepubs/9699919799/functions/fprintf.html