bug#40096: 26.3; set-transient-map does not work with remapped bindings

[Lars Ingebrigtsen <larsi@gnus.org>]

Uros Perisic <uros.m.perisic@gmail.com> writes:

> Here's a recipe to reproduce it starting form emacs -Q:
> #+BEGIN_SRC elisp
> (setq mymap (make-sparse-keymap))
> (defun message-foo () (interactive) (message "foo"))
> (defun message-bar () (interactive) (message "bar"))
> (define-key mymap "f" #'message-foo)
> (set-transient-map mymap t)
> ;; continually press f and note that foo is constantly messaged
> ;; press any other letter and it will stop
> (define-key mymap [remap message-foo] #'message-bar)
> (set-transient-map mymap t)
> ;; note that pressing f only echoes foo once
> #+END_SRC

Thanks for the clear recipe.  I've now fixed this in Emacs 29.

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