Note: help and version output are generated by a naïve script which tries a few variants of
<command> --help, <command> -h etc. to find the command's help and version info.
Sometimes it gets lucky, sometimes it doesn't; if the output below looks wrong, it probably is.
autoupdate2.13 --version (return code: 0)
Autoconf version 2.13
autoupdate2.13 --help (return code: 0)
Usage: autoupdate [-h] [--help] [-m dir] [--macrodir=dir]