Issue 8750: Fixed MutableSet's methods to correctly handle reflexive operations, namely x -= x and x ^= x
diff --git a/Misc/NEWS b/Misc/NEWS
index 5d23464..304977b 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -126,6 +126,9 @@
 Library
 -------
 
+- Issue #8750: Fixed MutableSet's methods to correctly handle
+  reflexive operations, namely x -= x and x ^= x.
+
 - Issue #9129: smtpd.py is vulnerable to DoS attacks deriving from missing 
   error handling when accepting a new connection.