Update of bug #55789 (project groff):
Severity: 3 - Normal => 2 - Minor
Status: None => Confirmed
Assigned to: None => schwarze
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Follow-up Comment #1:
1) -xsh4.2 is unused in FreeBSD-12.0, NetBSD-8.0, OpenBSD-6.4, and in the
Linux man pages project. It is an alias for a part of an ancient standard
that is no longer important. I should remove it from mandoc rather than
having it added to groff.
2) -susv1 is also unused in all four systems. But given that the original
Single UNIX Specification is of considerable historical importance, that the
alias -xpg4.2 is widely used, and that the newer versions -susv2 and -susv3
also see some limited use, adding it to groff for completeness may be better
than deleting it from mandoc.
3) -susv4 is used in a handful of pages in FreeBSD-12.0. Using the alias
-p1003.1-2008 would probably be better, but i guess breaking those pages would
be gratuitious, and besides, -susv4 is the current version of the standard, so
i think adding the alias is OK.
If somebody confirms in a comment that adding -susv1 and -susv4 and deleting
-xsh4.2 is a reasonable plan, i'll write and push a diff doing that. Of
course, it's an extremely low-priority issue...
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