diff --git a/Lib/idlelib/ToolTip.py b/Lib/idlelib/ToolTip.py
index 691f5101c16..eadcdea5a14 100644
--- a/Lib/idlelib/ToolTip.py
+++ b/Lib/idlelib/ToolTip.py
@@ -81,7 +81,7 @@ def main():
     b.pack()
     root.update()
     tip = ListboxToolTip(b, ["Hello", "world"])
-    
+
     # root.mainloop() # not in idle
 
 main()