bug#52896: 29.0.50; transient-mark-mode is set to a lot of 'only syms

[Andrey Listopadov]

> Sorry, please use the patch below instead:
>
> diff --git a/lisp/simple.el b/lisp/simple.el
> index 070d276..cbcde9f 100644
> --- a/lisp/simple.el
> +++ b/lisp/simple.el
> @@ -6664,7 +6664,7 @@ exchange-point-and-mark
>          (user-error "No mark set in this buffer"))
>      (set-mark (point))
>      (goto-char omark)
> -    (cond (temp-highlight
> +    (cond ((and (not arg) (not temp-highlight))
>            (setq-local transient-mark-mode (cons 'only transient-mark-mode)))
>           ((xor arg (not (region-active-p)))
>            (deactivate-mark))

Seems to work without issues