bug#22604: 24.5; (elisp) `Key Binding Conventions': what about other `C-c' keys?

[Eli Zaretskii]

> Date: Tue, 9 Feb 2016 07:29:05 -0800 (PST)
> From: Drew Adams <drew.adams@oracle.com>
> Cc: 22604@debbugs.gnu.org
> 
> > > For example, Lars recently proposed, in bug thread 22172, to bind
> > > `C-c +' and `C-c -' by default.  Making the doc clearer about this
> > > would preclude such a suggestion, as those keys would fall under
> > > the category of "other punctuation", which is reserved for minor modes.
> > 
> > Then they cannot be used if we follow our conventions.  That looks clear
> > enough to me.
> 
> You feel that the convention is clear enough for you.
> 
> Although I might agree with your interpretation of the convention
> as currently stated, I would like it to be stated more clearly,
> explicitly saying what it means by "punctuation", for example.

It's not really easy to define "punctuation" here.  More importantly,
some of the characters that _are_ reserved aren't punctuation by
Unicode categorization (they are symbols).

Would it help if we said "ASCII punctuation and symbol characters"?
That's the official name of those characters, AFAICT, and the "ASCII"
part makes sure no one will think about non-ASCII punctuation
characters, which I think we don't want to reserve.

Enumerating the characters can be tedious, so I think we'd like to
avoid that.