Issue #5219: Prevent event handler cascade in IDLE.
Patch by Roger Serwy.
diff --git a/Misc/NEWS b/Misc/NEWS
index 6d51cba..88e5e84 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -24,6 +24,8 @@
 Library
 -------
 
+- Issue #5219: Prevent event handler cascade in IDLE.
+
 - Issue #3835: Refuse to use unthreaded Tcl in threaded Python.
 
 - Issue #2843: Add new Tk API to Tkinter.