prevent IDLE from trying to close when sys.stdin is reassigned (#17838)
diff --git a/Misc/NEWS b/Misc/NEWS
index 624a8af..0405fb9 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -122,6 +122,8 @@
 IDLE
 ----
 
+- Issue #17838: Allow sys.stdin to be reassigned.
+
 - Issue #14735: Update IDLE docs to omit "Control-z on Windows".
 
 - Issue #17585: Fixed IDLE regression. Now closes when using exit() or quit().