Tweak the threaded example in concurrent.futures
diff --git a/Misc/NEWS b/Misc/NEWS
index f779e02..115e94d 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -143,6 +143,9 @@
 Documentation
 -------------
 
+- Additional comments and some style changes in the concurrent.futures URL
+  retrieval example
+
 - Issue #16115: Improve subprocess.Popen() documentation around args, shell,
   and executable arguments.