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.
dot2gxl version (return code: 0)
Can't open version
dot2gxl help (return code: 0)
Can't open help