bpo-42381: Document walrus-related syntax changes in whatsnew (GH-23382)

Automerge-Triggered-By: GH:lysnikolaou

diff --git a/Doc/whatsnew/3.10.rst b/Doc/whatsnew/3.10.rst
index 0e5e841ff44d709cedfc8ab8c42e27834baea5e6..95594413440b85ae03978910ab6dc230d52cd205 100644 (file)
--- a/Doc/whatsnew/3.10.rst
+++ b/Doc/whatsnew/3.10.rst
@@ -154,6 +154,9 @@ Other Language Changes
   :meth:`~object.__index__` method).
   (Contributed by Serhiy Storchaka in :issue:`37999`.)
 
+* Assignment expressions can now be used unparenthesized within set literals
+  and set comprehensions, as well as in sequence indexes (but not slices).
+
 
 New Modules
 ===========