Tkinter rename reversal: remove tkinter package, adapt imports and docs.
diff --git a/Lib/idlelib/CallTipWindow.py b/Lib/idlelib/CallTipWindow.py
index 27ed085..2223885 100644
--- a/Lib/idlelib/CallTipWindow.py
+++ b/Lib/idlelib/CallTipWindow.py
@@ -4,7 +4,7 @@
 Used by the CallTips IDLE extension.
 
 """
-from tkinter import *
+from Tkinter import *
 
 HIDE_VIRTUAL_EVENT_NAME = "<<calltipwindow-hide>>"
 HIDE_SEQUENCES = ("<Key-Escape>", "<FocusOut>")