DOC: clairify auto-level behavior

tacaswell · tacaswell · commit 6942f7fba82c · 2015-07-05T02:01:30.000-04:00
closes #4537
diff --git a/lib/matplotlib/contour.py b/lib/matplotlib/contour.py
@@ -1667,7 +1667,7 @@ def _initialize_x_y(self, z):
           contour(Z,N)
           contour(X,Y,Z,N)
 
-        contour *N* automatically-chosen levels.
+        contour up to *N* automatically-chosen levels.
 
         ::
 
