Re: Changes for emacs 28

[Dmitry Gutov]

On 13.09.2020 06:57, Richard Stallman wrote:
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>
> There are two problems with C-?:
>
> * It requires two shift keys, so it is inconvenient.

Do you mean two modifier keys?

It's just one shift key. C-? is the same as C-S-/, at least in GUI version.

> (The bindings for undo ensure it can be typed with just one
> shift key on all usual terminals.)

C-_, one of the two existing bindings for 'undo', has the exact same 
problem. Which, for undo, is more significant, I'd say.

> * It does not exist at all on ttys.  (I don't know whether we can
> change that on Linux consoles.)

I don't know either.

It _is_ a drawback, especially for users who tend to switch between GUI 
and terminal, but I don't have any better suggestions about that. But as 
far as new users are concerned, GUI Emacs is a lot more popular.

> Whether constitutes a problem for the undo-redo feature depends on the
> precise meanings of the two commands.  I don't know those details
> so I can't judge.

I don't think it is. As Juri said, the target audience of this feature 
expects 'undo' to be on Ctrl-Z and 'redo' on Ctrl-Shift-Z (though many 
editors bind it to Ctrl-Y as well).

> M-_ is likewise inconvenient because of the need for two shift keys.

I guess you do mean "two modifier keys". See above.