bug#10477: zap-to-char should allow picking from history

[Lars Ingebrigtsen <larsi@gnus.org>]

Juri Linkov <juri@linkov.net> writes:

>> I've now implemented this in Emacs 27 -- it was more code than expected,
>> so perhaps simple.el isn't the right place for it.  On the other hand,
>> `zap-to-char' is there, so perhaps that's the right place for it?
>
> I tried typing the up arrow, but it fails with the error
> "Non-character input-event".  Is this intentional?

That's the way the command has always worked, so I didn't change that.

>> Or it could go to subr-x.el with an autoload -- `zap-to-char' probably
>> isn't the most used command ever, anyway, and I'm not sure
>> `read-char-with-history' has much utility outside that command.
>
> Indeed, subr-x.el looks like a more suitable place.
>
> Another variant is create a new file for commands reading input
> with a name like read-x.el (or maybe minibuffer-x.el or prompt-x.el).
> Then put here `read-char-with-history', also all functions from
> lisp/emacs-lisp/map-ynp.el and lisp/emacs-lisp/rmc.el,
> maybe also read-char-choice from subr.el.

Makes sense to me.

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