bug#60077: 29.0.60; Is xterm modifyOtherKeys support broken?

[Eli Zaretskii <eliz@gnu.org>]

> From: Len Trigg <lenbok@gmail.com>
> Date: Thu, 15 Dec 2022 21:57:00 +1300
> Cc: 60077@debbugs.gnu.org
> 
> On Thu, 15 Dec 2022 at 21:38, Len Trigg <lenbok@gmail.com> wrote:
> 
>  Do you think it's just a matter of the dolist on line 466 of xterm.el needing additional entries (I don't see
>  one there for M-SPC)?
> 
> For example, I see there looks to be an entry for C-M-SPC:
>                    (7 32 [?\C-\M-\s])
> And my wild speculation from looking at the example table "Other modified-key escapes" on
> https://invisible-island.net/xterm/modified-keys-us-pc105.html is that emacs would need an entry like:
>                    (3 32 [?\M-\s])
> to handle the modifyOtherKeys encoding of "\E[27;3;32~" for M-SPC,

If that fixes the problem, we could install it.

> but also that there are probably
> many many other sequences that aren't being handled.

There's nothing wrong with solving this one problem at a time, right?
Especially since we don't seem to have complaints about other
sequences.