bug#61227: 29.0.60; Customize UI for customization of keys

[Eli Zaretskii]

> From: Drew Adams <drew.adams@oracle.com>
> CC: "61227@debbugs.gnu.org" <61227@debbugs.gnu.org>,
>         "monnier@iro.umontreal.ca" <monnier@iro.umontreal.ca>
> Date: Thu, 2 Feb 2023 17:37:47 +0000
> 
> > > If defcustom type `key-sequence' is being used,
> > 
> > No, it's 'key', not 'key-sequence'.
> 
> OK, thx.  I guess that's something new in Emacs 29.
> I don't see it in 28.2 or before.  Hopefully the
> doc makes clear the difference between `key' and
> `key-sequence', whatever it is.
> 
> Does `key' type let you specify a command name, for
> a remapping key binding?  That was my suggestion.

Here's what the ELisp manual says about it:

  ‘key’
       The value is a valid key according to ‘key-valid-p’, and suitable
       for use with, for example ‘keymap-set’.