[Bug 289786] mdoc footer in stable/15 and main has horrible formatting

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=289786

--- Comment #7 from Ingo Schwarze <schwarze@usta.de> ---
I believe the OP is likely talking about mandoc -T ps or -T pdf output
mode, but chose to not mention that in this bug report.
At least i can reproduce broken formatting of the footer line in roughly the
way shown in the two PNG attachments in -T ps and -T pdf output mode on
OpenBSD-current.

I suspect this is an unfixed regression caused by the massive reorganization
committed on 2025-07-16 14:45 with the commit message starting with "In 2009,
kristaps@ decided that using EN as the basic unit for horizontal widths on
terminal output devices was the simplest option. [...] Fix this by changing
many internal variables in the terminal formatter to store widths in units of
BU instead of EN, improving compatibility."  Contrary to what one might expect,
the -T ps and -T pdf output modes are actually submodes of the terminal
formatter, which means that this reorg *can* cause fallout in these modes, and
the symptoms seem broadly consistent with something going awry with width
measurements and/or horizontal alignment.

I do not have a fix yet, but i shall investigate, so please bear with me, i
hope to provide an update during the next few days.  Files potentially involved
are mdoc_term.c, term_ps.c, term.c, and the *time*() functions in mandoc.c, and
interactions among the functions in these files.

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