The actual man2mus program appears to be not accessible to the easily searchable public internet anymore, but there's a few references to it - "usub/man2mus A manual page to .mus translator". It's Perl, apparently.
Neat.
Re:Why do we call it “boilerplate code?”
by petdance on Wednesday November 16, 2022 @09:56AM
(#33624031)
The reference to "Programming Perl" was no doubt helped along by Perl developer Jesse Sheidlower who worked at the OED in the early 2000s. From his Wikipedia page: "Although not a computer programmer by training, Sheidlower introduced Perl to the North American offices of Oxford University Press and developed tools for data manipulation when no programmers were available. He is also one of the core developers of Catalyst, a popular Perl web development framework."
Navy Contract Law (U.S. Bureau Naval Personnel) ix. 212/2 -- "This type of clause has proved so valuable that it is presently standard ‘boilerplate’ not only in shipbuilding contracts but also in almost every kind of contract."
The first reference in the OED for it being used w/r/t computer stuff is 1990:
L. Wall & R. L. Schwartz Programming Perl vii. 379 -- "Like mus itself, man2mus is not 100% effective, but can save you a lot of time producing the initial boilerplate."