bug#53362: 29.0.50; [PATCH] Make Completions sorting a user option

[Eli Zaretskii]

> From: Protesilaos Stavrou <info@protesilaos.com>
> Cc: 53362@debbugs.gnu.org
> Date: Wed, 19 Jan 2022 15:17:13 +0200
> 
> >> +(defcustom completions-sort 'lexicographic
> >> +  "Sort candidates in the *Completions* buffer.
> >> +
> >> +The value can be nil to disable sorting altogether,
> >> +`alphabetical' for alphabetical sorting, `lexicographic' for
> >> +lexicographic sorting
> >
> > Here you expect everyone to understand the subtle difference between
> > these two sorting orders.  I don't think this expectation is
> > reasonable.
> 
> Perhaps it is better to reference string-lessp and string-version-lessp
> directly?

That'd be a step backward, IMO.

> > Doesn't string-version-lessp do stuff that is only appropriate with
> > version numbers like 1.2.3beta?
> 
> It also helps when the string starts with a number:
> 
>     (sort '("1 test" "21 test" "11 test" "2 test") #'string-lessp)
>     ;; => ("1 test" "11 test" "2 test" "21 test")

Yes, and how does that match the "alphabetical order" description?