Add a reverse() method to collections.deque().
diff --git a/Doc/library/collections.rst b/Doc/library/collections.rst
index 7770b89..2ee2949 100644
--- a/Doc/library/collections.rst
+++ b/Doc/library/collections.rst
@@ -357,6 +357,11 @@
       Removed the first occurrence of *value*.  If not found, raises a
       :exc:`ValueError`.
 
+   .. method:: reverse()
+
+      Reverse the elements of the deque in-place and then return ``None``.
+
+      .. versionadded:: 3.2
 
    .. method:: rotate(n)