bug#21363: 25.0.50; Some characters confuse display

[Lars Ingebrigtsen]

Richard Stallman <rms@gnu.org> writes:

> This text from a message to emacs-devel
>
>    AVGVSTÓ·SACR·
>    A·A·LV́CIꟾ·A·FꟾLIꟾ·MEN·
>    PROCVLVS·ET·IV́LIÁNVS·
>    P · S ·
>    DÉDICÁTIÓNE·DECVRIÓNIBVS·ET·
>    AVGVSTÁLIBVS·CÉNAM·DEDÉRVNT
>
> confuses display on my Linux console.
> If you go to the second line of the text and type C-e,
> the cursor appears on the final middledot.

I can reproduce this problem in Emacs 28 (on the Linux console).

Switching `auto-composition-mode' indeed fixes the problem, so perhaps
we should just do that automatically when running on the console?  Let's
see...  is that the lisp/term/linux.el file?

Let's see...  Yes, putting

  ;; Compositions confuse cursor movement.
  (global-auto-composition-mode -1)

into that file fixes the issue for me on the Linux console, and does not
seem to be triggered when running from a terminal, so I'll go ahead and
push that change.

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no