Deprecate contextlib.nested().  The with-statement now provides this functionality directly.
diff --git a/Doc/library/contextlib.rst b/Doc/library/contextlib.rst
index d6ce9a7..7403a35 100644
--- a/Doc/library/contextlib.rst
+++ b/Doc/library/contextlib.rst
@@ -80,6 +80,8 @@
    :meth:`__exit__` methods should avoid raising exceptions, and in particular they
    should not re-raise a passed-in exception.
 
+   .. deprecated:: 3.1
+      The with-statement now supports this functionality directly.
 
 .. function:: closing(thing)