bug#41544: 26.3; Possible incorrect results from color-distance

[Eli Zaretskii]

> From: Lars Ingebrigtsen <larsi@gnus.org>
> Cc: mattiase@acm.org,  simenheg@runbox.com,  tom@tromey.com,
>   41544@debbugs.gnu.org
> Date: Wed, 19 Aug 2020 17:03:37 +0200
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> >> It's probably say "If non-nil, use old-style computation".
> >
> > Is that a useful doc string?
> 
> It would then go on to discuss the differences in the two approaches.  I
> thought you wanted only the first line.

So you propose to explain that the alternatives change what colors
Emacs considers "dark" and "light" when it needs to decide which
colors will contrast well enough, and let people experiment with these
two alternatives to their taste?  I'm not sure, but maybe that could
be useful to someone.