diff --git a/Lib/idlelib/StackViewer.py b/Lib/idlelib/StackViewer.py
index 5b3c87a522e..ab09db01637 100644
--- a/Lib/idlelib/StackViewer.py
+++ b/Lib/idlelib/StackViewer.py
@@ -100,7 +100,7 @@ def setfunction(value, key=key, object=self.object):
             item = make_objecttreeitem(key + " =", value, setfunction)
             sublist.append(item)
         return sublist
-        
+
 def get_stack(t=None, f=None):
     if t is None:
         t = sys.last_traceback