DOC: make doc string slightly more precise

tacaswell · tacaswell · commit 39b5dfcb34e3 · 2020-07-05T15:08:45.000-04:00
diff --git a/lib/matplotlib/colors.py b/lib/matplotlib/colors.py
@@ -1429,7 +1429,7 @@ def __init__(self, boundaries, ncolors, clip=False, *, extend='neither'):
         Parameters
         ----------
         boundaries : array-like
-            Monotonically increasing sequence of boundaries.
+            Monotonically increasing sequence of at least 2 boundaries.
         ncolors : int
             Number of colors in the colormap to be used.
         clip : bool, optional
