bug#20499: C-x 8 shorthands for curved quotes, Euro, etc.

[Eli Zaretskii]

> From: Ivan Shmakov <ivan@siamics.net>
> Date: Thu, 07 May 2015 07:14:34 +0000
> 
> > Actually, we should drop the "ISO" part completely.  Characters don't
>  > belong to any encoding, they are entities that exists independently
>  > of any encoding.
> 
>         ISO 10646 is also a /repertoire/ of characters; so unless
>         'iso-transl is going to get support for characters outside this
>         particular set, the above will still be justified.  Albeit
>         mildly redundant, I guess.

We are splitting hair.  But as long as we do, I see no reason to
promise or assume that iso-transl will always support only Unicode
codepoints; e.g., "C-x 8 RET" already supports more.

So I'd rather we dropped that reference entirely.