DOC: Mention shorthand hex RGB(A) in color demo.

QuLogic · QuLogic · commit cd7ed94493f6 · 2020-07-09T18:46:41.000-04:00
cf #15152
diff --git a/examples/color/color_demo.py b/examples/color/color_demo.py
@@ -8,19 +8,22 @@
 1) an RGB or RGBA tuple of float values in ``[0, 1]`` (e.g. ``(0.1, 0.2, 0.5)``
    or ``(0.1, 0.2, 0.5, 0.3)``).  RGBA is short for Red, Green, Blue, Alpha;
 2) a hex RGB or RGBA string (e.g., ``'#0F0F0F'`` or ``'#0F0F0F0F'``);
-3) a string representation of a float value in ``[0, 1]`` inclusive for gray
+3) a shorthand hex RGB or RGBA string, equivalent to the hex RGB or RGBA
+   string obtained by duplicating each character, (e.g., ``'#abc'``, equivalent
+   to ``'#aabbcc'``, or ``'#abcd'``, equivalent to ``'#aabbccdd'``);
+4) a string representation of a float value in ``[0, 1]`` inclusive for gray
    level (e.g., ``'0.5'``);
-4) a single letter string, i.e. one of
+5) a single letter string, i.e. one of
    ``{'b', 'g', 'r', 'c', 'm', 'y', 'k', 'w'}``, which are short-hand notations
    for shades of blue, green, red, cyan, magenta, yellow, black, and white;
-5) a X11/CSS4 ("html") color name, e.g. ``"blue"``;
-6) a name from the `xkcd color survey <https://xkcd.com/color/rgb/>`__,
+6) a X11/CSS4 ("html") color name, e.g. ``"blue"``;
+7) a name from the `xkcd color survey <https://xkcd.com/color/rgb/>`__,
    prefixed with ``'xkcd:'`` (e.g., ``'xkcd:sky blue'``);
-7) a "Cn" color spec, i.e. ``'C'`` followed by a number, which is an index into
+8) a "Cn" color spec, i.e. ``'C'`` followed by a number, which is an index into
    the default property cycle (:rc:`axes.prop_cycle`); the indexing is intended
    to occur at rendering time, and defaults to black if the cycle does not
    include color.
-8) one of ``{'tab:blue', 'tab:orange', 'tab:green', 'tab:red', 'tab:purple',
+9) one of ``{'tab:blue', 'tab:orange', 'tab:green', 'tab:red', 'tab:purple',
    'tab:brown', 'tab:pink', 'tab:gray', 'tab:olive', 'tab:cyan'}`` which are
    the Tableau Colors from the 'tab10' categorical palette (which is the
    default color cycle);
