bug#47073: 28.0.50; speedbar: sorting in sublists is in reverse

[Lars Ingebrigtsen]

haj@posteo.de (Harald Jörg) writes:

> This isn't specific for "current" Emacs, it happens in Emacs 26.1, too.
>
> How to reproduce:
>
>  - emacs -Q
>  - open a Perl file with lots of subroutines
>    (e.g. https://github.com/foswiki/distro/blob/master/core/lib/Foswiki.pm)
>    or a Elisp file with lots of defuns
>    (e.g. lisp/progmodes/cperl-mode.el)
>  - M-x speedbar
>
> Following the default configuration, speedbar clusters the display of
> subroutines into alphabetically sorted batches of 20 entries each.

I've barely used speedbar before, but where does speedbar display these
clusters?  The window that pops up with "emacs -Q" and `M-x speedbar' in
cperl-mode.el is unclustered, as far as I can tell.

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