This is more compatible with Common Lisp and XEmacs (Bug#21690). See:
http://lists.gnu.org/archive/html/emacs-devel/2015-10/msg01053.html
* lisp/color.el (color-hue-to-rgb, color-hsl-to-rgb)
(color-xyz-to-srgb, color-xyz-to-lab):
* lisp/emacs-lisp/cl-extra.el (cl-float-limits):
* lisp/net/shr-color.el (shr-color-hue-to-rgb)
(shr-color-hsl-to-rgb-fractions):
Exploit the change to simplify the code a bit.
* lisp/emacs-lisp/bytecomp.el (byte-compile-quo):
Don’t complain about single-argument calls to ‘/’.
* src/data.c (arith_driver, float_arith_driver):
Implement the change.
* lisp/erc/erc-track.el, lisp/erc/erc-networks.el, lisp/erc/erc-netsplit.el:
* lisp/erc/erc-dcc.el, lisp/erc/erc-backend.el: Use cl-lib, nth, pcase, and
called-interactively-p instead of cl.
* lisp/erc/erc-speedbar.el, lisp/erc/erc-services.el:
* lisp/erc/erc-pcomplete.el, lisp/erc/erc-notify.el, lisp/erc/erc-match.el:
* lisp/erc/erc-log.el, lisp/erc/erc-join.el, lisp/erc/erc-ezbounce.el:
* lisp/erc/erc-capab.el: Don't require cl since we don't use it.
* lisp/erc/erc.el: Use cl-lib, nth, pcase, and called-interactively-p i.s.o cl.
(erc-lurker-ignore-chars, erc-common-server-suffixes): Move before first use.
* lisp/json.el: Don't require cl since we don't use it.
* lisp/color.el: Don't require cl.
(color-complement): `caddr' -> `nth 2'.
* test/automated/ert-x-tests.el: Use cl-lib.
* test/automated/ert-tests.el: Use lexical-binding and cl-lib.
Prefer pcase-let over destructuring-bind.
* lisp/vc/diff-mode.el (diff-remove-trailing-whitespace): Same.
Also, remove whitespace as we go, rather than after accumulating the
various places.
* lisp/color.el (color-name-to-rgb): Rename from color-rgb->normalize.
Autoload. Add optional arg FRAME, and pass it to color-values.
(color-complement): Caller changed. Doc fix.
(color-gradient): Rewrite for better clarity and efficiency.
(color-rgb-to-hex): Rename from color-rgb->hex.
(color-rgb-to-hsv): Rename from color-rgb->hsv. Force hue and
saturation to zero if the value is too small.
(color-rgb-to-hsl): Rename from color-rgb->hsl.
(color-srgb-to-xyz): Rename from color-srgb->xyz. Doc fix.
(color-xyz-to-srgb): Rename from color-xyz->srgb. Doc fix.
(color-xyz-to-lab): Rename from color-xyz->lab. Doc fix.
(color-lab-to-xyz): Rename from color-lab->xyz. Doc fix.
(color-lab-to-srgb): Rename from color-lab->srgb. Doc fix.
(color-cie-de2000): Doc fix.
* lisp/facemenu.el (color-rgb-to-hsv): Deleted; use the version in
lisp/color.el instead.
(list-colors-sort-key, list-colors-print): Use
color-normalized-values.
* lisp/faces.el (color-values): Use cond for clarity. Doc fix.
* lisp/gnus/shr-color.el (shr-color->hexadecimal): Use renamed
function names color-rgb-to-hex, color-name-to-rgb,
color-srgb-to-lab, and color-lab-to-srgb.
mm-decode.el (mm-inline-media-tests): Do not check for diff-mode it's standard in Emacs nowadays.
color.el (color-gradient): Add a color-gradient function.
