Let set.union() and set.update() accept multiple inputs.
diff --git a/Misc/NEWS b/Misc/NEWS
index 4337e5d..05f7419 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -12,6 +12,8 @@
 Core and Builtins
 -----------------
 
+- The set methods, update() and union() now accept multiple arguments.
+
 - Issue #2898: Added sys.getsizeof() to retrieve size of objects in bytes.
 
 - New environment variable PYTHONIOENCODING.