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Re: Changes for emacs 28

From: Dmitry Gutov
Subject: Re: Changes for emacs 28
Date: Sun, 13 Sep 2020 13:24:12 +0300
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0

On 13.09.2020 06:57, Richard Stallman wrote:
[[[ To any NSA and FBI agents reading my email: please consider    ]]]
[[[ whether defending the US Constitution against all enemies,     ]]]
[[[ foreign or domestic, requires you to follow Snowden's example. ]]]

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.

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