I am not sure (and too lazy to check) if the issue is with groff vs mandoc (the typesetters) or instead with tmac.an aka -man vs tmac.doc aka -mdoc (the macro p

I am not sure (and too lazy to check) if the issue is with groff vs mandoc (the typesetters) or instead with tmac.an aka -man vs tmac.doc aka -mdoc (the macro packages, one presentational, the other semantic) — note the confusingly similar names. I understand the BSDs have been switching their pages to -mdoc for the most part, but on a typical Linux system you’ll find both used quite a lot (and even for GNU software, most though not all will not have come from the GNU project, what with that project being actively hostile to man pages).