bug#54263: 29.0.50; color-values-from-color-spec accepts whitespace in rgbi: specifications

[Eli Zaretskii]

> From: Mattias Engdegård <mattiase@acm.org>
> Date: Sun, 6 Mar 2022 12:23:46 +0100
> Cc: 54263@debbugs.gnu.org, Philip Kaludercic <philipk@posteo.net>,
>  Lars Ingebrigtsen <larsi@gnus.org>
> 
> The previous patch erroneously accepted "rgbi:0/+0x0/0". Here is one that 
> doesn't try to be clever.
> Clear for emacs-28?

I see no reason to install this on the release branch.  It is not a
recent regression, and there are no specific bug reports for it.

So please install the fix for this on master.

Thanks.