Subject: bug#2805: 23.0.90; why is
minibuffer-default-add-completions a command?

>> Should `minibuffer-default-add-completions' really be an
>> interactive function? I don't see where that feature is
>> used anywhere.

> Hmm, I don't remember why it was implemented as interactive.
> But now I see no reason why it should be interactive.

It may have been convenient when testing it. Please remove the
(interactive) thingy.