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.
html2markdown --version (return code: 0)
html2markdown --HELP (return code: 2)
Usage: html2markdown [(filename|url) [encoding]]
html2markdown: error: no such option: --HELP