mmark(1) on Linux
The text 5c695d24f9bc, as Debian 10 (Buster), Debian 9 (Stretch) shipped it.
Markdown processor written in Go geared for the IETF
Flags it lists
-
-bib-id -
-bib-rfc -
-css -
-head -
-page -
-xml -
-xml2