Doc: specify default keyword argument for 'extend'

efiring · timhoffm · web-flow · commit 3b6ac629c461 · 2020-05-31T06:22:01.000-10:00
Co-authored-by: Tim Hoffmann &lt;2836374+timhoffm@users.noreply.github.com&gt;
diff --git a/lib/matplotlib/colors.py b/lib/matplotlib/colors.py
@@ -1427,7 +1427,7 @@ def __init__(self, boundaries, ncolors, clip=False, extend='neither'):
             they are below ``boundaries[0]`` or mapped to *ncolors* if they are
             above ``boundaries[-1]``. These are then converted to valid indices
             by `Colormap.__call__`.
-        extend : {'neither', 'both', 'min', 'max'}, optional
+        extend : {'neither', 'both', 'min', 'max'}, default: 'neither'
             Extend the number of bins to include one or both of the
             regions beyond the boundaries.  For example, if ``extend``
             is 'min', then the color to which the region between the first
