bug#64046: 30.0.50; Quoting in customize choice tags

[Stephen Berman <stephen.berman@gmx.net>]

On Thu, 20 Jul 2023 16:11:33 -0300 Mauro Aranda <maurooaranda@gmail.com> wrote:

> Stephen Berman <stephen.berman@gmx.net> writes:
>
>> On Sat, 15 Jul 2023 10:20:17 -0300 Mauro Aranda <maurooaranda@gmail.com>
>  wrote:
>>
>>> Turns out this code introduces regressions when customizing faces.
>>>
>>> With emacs -Q:
>>> M-x customize-face RET default
>>> Action the State button and choose: "For All Kinds of Displays"
>>> Action the Display menu and select "specific display"
>>> Wrong type argument: number-or-marker-p, "        "
>>>
>>> The substitute-command-keys operation is too destructive, and messes
>>> with things it shouldn't be modifying, like the :offset property of
>>> widgets in this case.
>
>> Sorry for not responding sooner; I was travelling and only now had time
>> to look into this.  If I debugged it correctly, the problem is that the
>> value of :extra-offset, 9, satisfies char-or-string-p, so then due to my
>> patch substitute-command-keys turns it into a string containing a TAB.
>
> No trouble at all.  And yes, that sounds correct to me.
>
>> The cases intended to be fixed by my patch are where strings with grave
>> quoting occur, which should be turned into strings with curve quoting.
>> If so, then testing for stringp suffices, and the attached patch avoids
>> the regression you found and gives the desired results for the other
>> cases discussed in this bug.  I don't know why I used char-or-string-p
>> instead of stringp in my original patch, and don't see a reason for it
>> now.  Or do you know of cases where testing for stringp is insufficient?
>
> I don't know, but I feel like stringp should suffice.  So please install
> your fix, and I will be alert if something else breaks.

Thanks, pushed to master as commit c55e67081e9.

Steve Berman