Issue #9290: In IDLE the sys.std* streams now implement io.TextIOBase
interface and support all mandatory methods and properties.
diff --git a/Misc/NEWS b/Misc/NEWS
index edd5c1e..005c39d 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -189,6 +189,9 @@
 Library
 -------
 
+- Issue #9290: In IDLE the sys.std* streams now implement io.TextIOBase
+  interface and support all mandatory methods and properties.
+
 - Issue #13454: Fix a crash when deleting an iterator created by itertools.tee()
   if all other iterators were very advanced before.