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Re: Tweaking the output of `C-h b'

From: Kévin Le Gouguec
Subject: Re: Tweaking the output of `C-h b'
Date: Mon, 01 Nov 2021 10:47:42 +0100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (gnu/linux)

Eli Zaretskii <eliz@gnu.org> writes:

>> Jonas's magit-section (available on NonGNU ELPA) more or less does
>> exactly that: on the GUI, add chevrons to the left fringe (right chevron
>> means "hit TAB to expand", down chevron means "hit TAB to fold back");
>> on the TUI, append ellipses to expandable sections.
> Don't we have similar stuff in Customize buffers?

The UI elements (chevrons) are similar, yes; IIUC the main difference is
that magit-section uses fringe bitmaps, while Customize uses SVG

As for features, AFAICT:

- magit-section is a reimplementation of outline-minor-mode which does
  not rely on regexps to delimit sections: it supports arbitrary nesting
  of subsections, and provides commands for visibility cycling and node
  navigation (see magit-section-mode-map).

- Meanwhile, Customize buffers "merely" provide ways to (un)fold single
  entities (user options) and jump to the previous/next buttons (which
  could be enough for the purposes of C-h b).

(I hope my comparison is accurate; if I'm being unfair to either library
I'd love to stand corrected)

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