bug#46665: 28.0.50; undefined entry on M-S-x in org-mode

[Gabriel do Nascimento Ribeiro]

Steps:
- emacs -Q
- change to some buffer in org-mode
- press M-S-X
- there is an `undefined` entry in the Completions list

[Eli Zaretskii]

> From: Gabriel do Nascimento Ribeiro <[hidden email]>
> Date: Sat, 20 Feb 2021 15:25:55 -0300
>
> Steps:
> - emacs -Q
> - change to some buffer in org-mode
> - press M-S-X
> - there is an `undefined` entry in the Completions list

Why is that a bug?

Did you try "M-x undefined RET" or "C-h f undefined RET"?

[Gabriel do Nascimento Ribeiro]

Eli Zaretskii <[hidden email]> writes:

>> From: Gabriel do Nascimento Ribeiro <[hidden email]>
>> Date: Sat, 20 Feb 2021 15:25:55 -0300
>>
>> Steps:
>> - emacs -Q
>> - change to some buffer in org-mode
>> - press M-S-X
>> - there is an `undefined` entry in the Completions list
>
> Why is that a bug?
>
> Did you try "M-x undefined RET" or "C-h f undefined RET"?

I tried "M-x undefined RET" before opening the bug report and I got:
    "M-x u n d e f i n e d RET is undefined"
so I thought it was a bug.

Now reading the docstring with "C-h f" I am not sure if this command is
supposed to be listed on "M-S-x" or not.
    "Beep to tell the user this binding is undefined."

If it's okay to have this "undefined" command on "M-S-x", we can close
this bug report. Sorry for any noise.