Tkinter rename reversal: remove tkinter package, adapt imports and docs.
diff --git a/Lib/idlelib/UndoDelegator.py b/Lib/idlelib/UndoDelegator.py
index 544be10..5896bd5 100644
--- a/Lib/idlelib/UndoDelegator.py
+++ b/Lib/idlelib/UndoDelegator.py
@@ -1,5 +1,5 @@
 import string
-from tkinter import *
+from Tkinter import *
 from Delegator import Delegator
 
 #$ event <<redo>>