Issue #18347: ElementTree's html serializer now preserves the case of closing tags.
diff --git a/Misc/NEWS b/Misc/NEWS
index fec41b7..8114b69 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -24,6 +24,9 @@
 Library
 -------
 
+- Issue #18347: ElementTree's html serializer now preserves the case of
+  closing tags.
+
 - Issue #17261: Ensure multiprocessing's proxies use proper address.
 
 - Issue #17097: Make multiprocessing ignore EINTR.