RE: Compilation warnings in mouse.el

[Drew Adams]

What is the problem that _not_ requiring or warning about
a missing :group tries to solve?

Stefan: Are you encouraging this only in order to allow
laziness and slightly less verbose code, or is there an
actual problem that occurs if people consistently provide
:group with defcustoms?

"Defcustoms should pretty much never have :group" is pretty
strong ("_should_"), even if you do qualify it with "pretty
much".  Why _should_ they?  Is it just to be less rigid, or
is there really a _problem_ that this solves?

It's pretty strong when someone as knowledgeable and
authoritative in Emacs as yourself says that something
_should_ be some way.  It helps if you say why.