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From: Mauro Aranda <maurooaranda@gmail.com>
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Subject: bug#64046: 30.0.50; Quoting in customize choice tags
Date: Wed, 30 Aug 2023 19:33:21 -0300
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Cc: Ola x Nilsson <ola.x.nilsson@axis.com>, 64046@debbugs.gnu.org
To: Stephen Berman <stephen.berman@gmx.net>
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Stephen Berman <stephen.berman@gmx.net> writes:

 > On Wed, 30 Aug 2023 12:29:47 -0300 Mauro Aranda 
<maurooaranda@gmail.com> wrote:
 >
 >> Stephen Berman <stephen.berman@gmx.net> writes:
 >>
 >>> On Mon, 28 Aug 2023 11:33:09 +0200 Ola x Nilsson 
<ola.x.nilsson@axis.com>
 >>  wrote:
 >>>
 >>>> I agree that quote substition should be done on the car of simple item
 >>>> definitions.  I have no opinion on susbstitute-command-keys vs
 >>>> substitute-quotes.  But I came to think about the TITLE argument,
 >>>> shouldn't quote substition be performed on it as well?
 >>>
 >>> I think you're right about that as well, since the title is simply a
 >>> display feature.  AFAIK it wouldn't make a noticeable difference for
 >>> existing uses of widget-choose in the Customize UI (in the Value menu
 >>> the title is simply "Choice" and in the State menu it's "Operation on
 >>> <option name>"), but it might be relevant for third party uses or 
future
 >>> uses in Emacs, as well as for ad-hoc uses of simple item definitions.
 >>> So applying substition to all uses of TITLE seems appropriate.  The
 >>> below patch does this, and also corrects my previous patch by excluding
 >>> substition from the cdr of simple item definitions.
 >>
 >> What would be a real-life scenario where we need to use
 >> substitute-command-keys on TITLE? I can't think of any.
 >
 > I can't think of a really convincing example where it's needed, but just
 > as a possibility for stylistic variation, e.g. for simple item
 > definitions one could have a more explicit prompt like this:
 >
 > (widget-choose "Type `0' or `1'" '(("Use `a'" . "Use `1'") ("Use `b'"
 > . "Use `2'")))
 >
 > which would appear as "Type ‘0’ or ‘1’" with curve-style quotes.  For
 > the Customize UI, although the title is currently hard-coded as
 > "Choice", one could define a widget with a title like "User's choice",
 > which would appear as "User’s choice" with the curve-style quote.
 > Unless some undesirable consequence of applying substitute-command-keys
 > to TITLE is found, I don't see any harm in allowing such uses.

I vote for don't adding code until it's really needed, and since there
isn't a real feature request for that, I'd leave it out.  Looks like we
disagree on this, and it's not really my call, so let's leave it for a
maintainer to decide whether to add that line of code or not.