GNU bug report logs - #65884
29.1; prettify-symbols-unprettify-at-point documentation

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Stefan Kangas <stefankangas <at> gmail.com>
Cc: tracker <at> debbugs.gnu.org
Subject: bug#65884: closed (29.1; prettify-symbols-unprettify-at-point
 documentation)
Date: Wed, 13 Sep 2023 20:47:02 +0000

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Your message dated Wed, 13 Sep 2023 13:45:47 -0700
with message-id <CADwFkmm7yEeQPG_B+bYjxUOH5Up_ovY7XdaQwU2G+dZisQ8gLA <at> mail.gmail.com>
and subject line Re: bug#65884: 29.1; prettify-symbols-unprettify-at-point documentation
has caused the debbugs.gnu.org bug report #65884,
regarding 29.1; prettify-symbols-unprettify-at-point documentation
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From: Peter Mao <peter.mao <at> gmail.com>
To: bug-gnu-emacs <at> gnu.org
Subject: 29.1; prettify-symbols-unprettify-at-point documentation
Date: Mon, 11 Sep 2023 21:20:25 -0700

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I just learned about prettify-symbols mode and
prettify-symbols-unprettify-at-point from Tony Zorman's recent blog post,
so I tried it out, unsuccessfully at first...

Recipe from emacs -Q:

In the *scratch* buffer:
M-x prettify-symbols-mode
(setq prettify-symbols-unprettify-at-point t)
C-x C-e ;; to evaluate the setq
lambda  ;; the symbol λ appears
C-b

At this point, I'm expecting the symbol λ to deprettify back to
"lambda", but it does not.

Looking in the code in prog-mode.el, I see that the unprettification
needs to be set **before** the minor mode is activated in the buffer.
Perhaps this should be pointed out in the documentation?

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From: Stefan Kangas <stefankangas <at> gmail.com>
To: Peter Mao <peter.mao <at> gmail.com>
Cc: 65884-done <at> debbugs.gnu.org
Subject: Re: bug#65884: 29.1;
 prettify-symbols-unprettify-at-point documentation
Date: Wed, 13 Sep 2023 13:45:47 -0700

Version: 29.2

Peter Mao <peter.mao <at> gmail.com> writes:

> I just learned about prettify-symbols mode and prettify-symbols-unprettify-at-point from Tony Zorman's recent blog post, so I tried it out, unsuccessfully
> at first...
>
> Recipe from emacs -Q:
>
> In the *scratch* buffer:
> M-x prettify-symbols-mode
> (setq prettify-symbols-unprettify-at-point t)
> C-x C-e ;; to evaluate the setq
> lambda  ;; the symbol λ appears
> C-b
>
> At this point, I'm expecting the symbol λ to deprettify back to
> "lambda", but it does not.
>
> Looking in the code in prog-mode.el, I see that the unprettification
> needs to be set **before** the minor mode is activated in the buffer.
> Perhaps this should be pointed out in the documentation?

Thanks, I've now documented this on emacs-29.

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