Issue #20510: Rewrote test_exit in test_sys to match existing comments
and to modernize.  Initial patch by Gareth Rees.
diff --git a/Misc/NEWS b/Misc/NEWS
index dd00110..47e40af 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -243,6 +243,10 @@
 Tests
 -----
 
+- Issue #20510: Rewrote test_exit in test_sys to match existing comments,
+  use modern unittest features, and use helpers from test.script_helper
+  instead of using subprocess directly.  Initial patch by Gareth Rees.
+
 - Issue #20532: Tests which use _testcapi now are marked as CPython only.
 
 - Issue #19920: Added tests for TarFile.list().  Based on patch by Vajrasky Kok.