Tkinter rename reversal: remove tkinter package, adapt imports and docs.
diff --git a/Lib/idlelib/TreeWidget.py b/Lib/idlelib/TreeWidget.py
index 876cb0d..5299e0e 100644
--- a/Lib/idlelib/TreeWidget.py
+++ b/Lib/idlelib/TreeWidget.py
@@ -15,7 +15,7 @@
 # - optimize tree redraw after expand of subnode
 
 import os
-from tkinter import *
+from Tkinter import *
 import imp
 
 import ZoomHeight