mandoc binary package in Ubuntu Questing arm64

 mandoc is a suite of tools compiling mdoc, the roff macro language of choice
 for BSD manual pages, and man, the predominant historical language for UNIX
 manuals. It is small, ISO C, ISC-licensed, and quite fast. The main component
 of the toolset is the mandoc utility program, based on the libmandoc
 validating compiler, to format output for UNIX terminals (with support for
 wide-character locales), XHTML, HTML, PostScript, and PDF.

Source package