https://xsltng.docbook.org/guide/2.8.0/ext_pygmentize.html
ext:pygmentize
extpygmentize
https://manpages.ubuntu.com/manpages/questing/man1/pygmentize.1.html
Ubuntu Manpage: pygmentize - highlights the input file
highlights the input file
ubuntumanpagepygmentizehighlightsinput