Closes issue 17947.  Adds PEP-0435 (Enum, IntEnum) to the stdlib.
diff --git a/Doc/library/datatypes.rst b/Doc/library/datatypes.rst
index d0382e0..48af082 100644
--- a/Doc/library/datatypes.rst
+++ b/Doc/library/datatypes.rst
@@ -30,3 +30,4 @@
    copy.rst
    pprint.rst
    reprlib.rst
+   enum.rst