Re: mandoc -man -Thtml bug: inconsistent vertical space before .TP

[Ingo Schwarze <schwarze@usta.de>]

Hi Alejandro,

Alejandro Colomar wrote on Mon, Oct 16, 2023 at 01:32:30PM +0200:

> groff -man -Thtml seems to never produce a blank line before a TP.

What do you mean by "blank line"?
I'm not aware that any such concept is defined in HTML,
at least not outside the "pre" element (and possibly a few
elements similar to "pre").

> mandoc -man -Thtml produces one in some cases, and I can't see a
> pattern.
> 
> I found this bug while reading feature_test_macros(7) in the Debian
> online manpages:
> <https://manpages.debian.org/bullseye/manpages/ftm.7.en.html>
> 
> To reproduce this bug, run the following in the Linux man-pages repo:
> 
>  1999  groff -man -T html man7/feature_test_macros.7 > ftm.g.html
>  2000  open ftm.g.html 
>  2001  mandoc -man -T html man7/feature_test_macros.7 > ftm.m.html
>  2002  open ftm.m.html 

You can see that particular page rendered here:

  https://man.bsd.lv/Test/ftm.7

It is a long page, and i have been unable to figure out what exactly
you are talking about.

Please point me to the precise position in the file where vertical
spacing before a .TP macro feels lacking or execessive to you,
for example by giving the exact text following that .TP macro,
and ideally also provide an example of where you feel vertical
spacing is about right.

Also note that comparing to groff -T html output is completely
useless because groff -T html output is of utterly atrocious
quality, violating the HTML standard in almost every way imaginable.

Yours,
  Ingo
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