Re: "whether the global keymap C-x 4 will be replaced by a command,"

[Juri Linkov]

>> This means that after binding the current ctl-x-4-map in Emacs core
>> to the other-window command, 'C-h k C-x 4' will display the help for
>> that command, not for the whole sequence 'C-h k C-x 4 C-f'.
>
> I don't think we can/should make `C-h k` read all of `C-x 4 C-f`, indeed.
> But maybe we could make the following work: `C-x 4 C-h k C-f`.

Would it be more expected for `C-x 4 C-h k C-f` to show the help buffer
about `C-f` (forward-char) in another window?

The prefix `C-x 4` says "show the output of the next command in
another window" where the next command is `C-h k C-f`.