Bug#864925: wiki.debian.org: gridlines in tables

Package: wiki.debian.org
Followup-For: Bug #864925

I'm using the following custom style to godd effect:

th, td { border-bottom: 1px solid #d2d3d7; }

Sample page:

https://wiki.debian.org/SystemBuildTools

Before:

https://screenshots.firefox.com/KCOr4HJHKqiNqcbQ/wiki.debian.ogr

After:

https://screenshots.firefox.com/KCOr4HJHKqiNqcbQ/wiki.debian.org

Seems way more readable to me! :)

Do notice how it will outline structure problems in some tables (see
the "General tools" section for an example). I consider that a
feature.

-- System Information:
Debian Release: buster/sid
  APT prefers testing
  APT policy: (500, 'testing'), (1, 'experimental'), (1, 'unstable')
Architecture: amd64 (x86_64)

Kernel: Linux 4.18.0-2-amd64 (SMP w/4 CPU cores)
Locale: LANG=fr_CA.UTF-8, LC_CTYPE=fr_CA.UTF-8 (charmap=UTF-8), LANGUAGE=fr_CA.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled