Update OrderedDict implementation to match that in Py2.7.
diff --git a/Misc/NEWS b/Misc/NEWS
index 1126d4a..0ad7ebd 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -29,6 +29,9 @@
 Library
 -------
 
+- Update collections.OrderedDict to match the implementation in Py2.7
+  (based on lists instead of weakly referenced Link objects).
+
 - Issue #8397: Raise an error when attempting to mix iteration and regular
   reads on a BZ2File object, rather than returning incorrect results.