Author: Diane Trout <diane@ghic.org>
Bug: https://github.com/dask/dask/issues/2530
Description: numpydoc adds checks to avoid sections with duplicate names.
 The way that Dask adds a comment listing unsupported arguments to
 the docstring can trigger that check.
 .
 This is a work around by using a totally new section name.

--- a/dask/utils.py
+++ b/dask/utils.py
@@ -502,7 +502,7 @@
                 not_supported.extend(ua_args)
 
             if len(not_supported) > 0:
-                note = ("\n        Notes\n        -----\n"
+                note = ("\n        Caution\n        -------\n"
                         "        Dask doesn't support the following argument(s).\n\n")
                 args = ''.join(['        * {0}\n'.format(a) for a in not_supported])
                 doc = doc + note + args