I get messages like these in /var/log

Nov 28 18:34:15 xxxx gdm3][14949]: pam_unix(gdm3:session): session closed for user xxxx
Nov 29 11:05:30 xxxx gdm-welcome][22332]: pam_unix(gdm-welcome:session): session closed for user Debian-gdm

Note the extra `]' after "gdm3" or "gdm-welcome".

I know this is minor but it's a little bit annoying, as it forces me
to add a new logcheck regexp to discard those messages.

Thanks.