bug#36304: 27.0.50; request: switch to the superior HTML #RGB convention for colors

[Robert Pluim]

>>>>> On Fri, 28 Jun 2019 09:28:53 +0000, Pip Cet <pipcet@gmail.com> said:
    Pip> Complete updated patch attached.

As someone willfully and woefully ignorant of Emacs' colour handling,
I gave this patch a read, and I find it perfectly clear. One very
minor nit below (which was there before this patch)

    Pip> @@ -978,7 +982,7 @@ tty-color-translate
    Pip>    "Given a color COLOR, return the index of the corresponding TTY 
color.
 
    Pip>  COLOR must be a string that is either the color's name, or its X-style
    Pip> -specification like \"#RRGGBB\" or \"RGB:rr/gg/bb\", where each 
primary.
    Pip> +specification like \"#RRGGBB\" or \"rgb:RR/GG/BB\", where each 
primary.

Thereʼs an extra '.' at the end of this line.