Add alternate constructor for itertools.chain().
diff --git a/Misc/NEWS b/Misc/NEWS
index c28fd85..6df4ebc 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -1247,6 +1247,8 @@
 - itertools.starmap() now accepts any iterable input. Previously, it required
   the function inputs to be tuples.
 
+- itertools.chain() now has an alterate constructor, chain.from_iterable().
+
 - Issue #1646: Make socket support TIPC. The socket module now has support
   for TIPC under Linux, see http://tipc.sf.net/ for more information.