Package: udev
Version: 231-6
Severity: wishlist
Perhaps on upgrade instead of saying
addgroup: The group `input' already exists as a system group. Exiting.
say nothing, and instead just say
Adding group `input'.
if adding.That way you need only make one message once, instead of a message upon each upgrade. And it is a message about doing something, instead of a message about doing nothing. No need to distract system administrators with a message about doing nothing, each upgrade.

