Issue #18104: Add idlelib/idle_test/htest.py with a few sample tests to begin
consolidating and improving human-validated tests of Idle. Change other files
as needed to work with htest.  Running the module as __main__ runs all tests.
diff --git a/Misc/NEWS b/Misc/NEWS
index 6548956..5d3209d 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -308,6 +308,10 @@
 IDLE
 ----
 
+- Issue #18104: Add idlelib/idle_test/htest.py with a few sample tests to begin
+  consolidating and improving human-validated tests of Idle. Change other files
+  as needed to work with htest.  Running the module as __main__ runs all tests.
+
 - Issue #21139: Change default paragraph width to 72, the PEP 8 recommendation.
 
 - Issue #21284: Paragraph reformat test passes after user changes reformat width.