Bug#1000291: manpages.debian.org: CSS for .TQ renders ... badly

[Samuel Bronson <naesten@gmail.com>]

Package: manpages.debian.org
Severity: normal

Dear Maintainer,

Something is going wrong with the .TQ macro on manpages.debian.org.
Specifically, the tags from adjacent .TP and .TQ macros all appear on
top of eachother.

(I have dim recollections of a similar effect involving just .TP with an
empty paragraph or somesuch.)

For example, see:
    https://manpages.debian.org/bullseye/groff-base/groff.1.en.html#T
and note the unreadable mess immediately below "dvi":

The relevant portion of the source text is:

.TP
html
.TQ
xhtml
HTML and XHTML output (preprocessors are
.B soelim
and
.BR \%pre-grohtml ,
postprocessor is
.BR \%post-grohtml ).

This is definitely something to do with debiman's CSS, but it may also
relate to the version of docman in use, and I don't know how to
reproduce manpages.debian.org's install.

-- System Information:
Debian Release: 10.10
  APT prefers oldstable-updates
  APT policy: (500, 'oldstable-updates'), (500, 'oldstable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 5.10.60.1-microsoft-standard-WSL2 (SMP w/16 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: unable to detect