bug#69079: [PATCH] Add 'customize-toggle-option' command

[Eli Zaretskii]

> From: Philip Kaludercic <philipk@posteo.net>
> Date: Mon, 12 Feb 2024 17:32:37 +0000
> 
> +;;;###autoload
> +(defun customize-toggle-option (opt)
> +  "Toggle the value of boolean option OPT for this session."
> +  (interactive (let (opts)
> +              (mapatoms
> +               (lambda (sym)
> +                 (when (eq (get sym 'custom-type) 'boolean)
> +                   (push sym opts))))
> +              (list (intern (completing-read "Option: " opts)))))
> +  (message "%s user options '%s'."
> +        (if (funcall (or (get opt 'custom-set) #'set-default)
> +                     opt (not (funcall (or (get opt 'custom-get)
> +                                           #'symbol-value)
> +                                       opt)))
> +            "Enabled" "Disabled")
> +        opt))

Shouldn't this have some validation? what if the argument OPT is not a
boolean?

And the prompt should IMO say "Toggle boolean option: ".