Add Misc/NEWS entry for issue #10519
diff --git a/Misc/NEWS b/Misc/NEWS
index 86042f2..09f9e32 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -9,6 +9,9 @@
 Core and Builtins
 -----------------
 
+- Issue #10519: Avoid unnecessary recursive function calls in
+  setobject.c.
+
 - Issue #13268: Fix the assert statement when a tuple is passed as the message.
 
 - Issue #13018: Fix reference leaks in error paths in dictobject.c.