Output from 'groups' is suddently different to /etc/group

Fri Jul 20 13:35:30 UTC 2018

Date: Fri, 20 Jul 2018 15:09:25 +0200
From: "R. Diez via ubuntu-users" <ubuntu-users at lists.ubuntu.com>
To: kauer...
Cc: "R. Diez" <rdiezmail-ubuntu at yahoo.de>, ubuntu-users at lists.ubuntu.com
Subject: Output from 'groups' is suddently different to /etc/group

You shouldn't reply to Karl, I doubt that he likes this. Reply to the
mailing list only.