SF #904720:  dict.update should take a 2-tuple sequence like dict.__init_
(Championed by Bob Ippolito.)

The update() method for mappings now accepts all the same argument forms
as the dict() constructor.  This includes item lists and/or keyword
arguments.
diff --git a/Misc/NEWS b/Misc/NEWS
index 1bd6c2b..72232c8 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -32,6 +32,10 @@
   the overallocation is no more than three elements -- this improves space
   utilization for applications that have large numbers of small lists.
 
+- The dict.update() method now accepts all the same argument forms
+  as the dict() constructor.  This now includes item lists and/or
+  keyword arguments.
+
 - Support for arbitrary objects supporting the read-only buffer
   interface as the co_code field of code objects (something that was
   only possible to create from C code) has been removed.