Tkinter rename reversal: remove tkinter package, adapt imports and docs.
diff --git a/Lib/lib-tk/Dialog.py b/Lib/lib-tk/Dialog.py
index 75e7fed..2d08959 100644
--- a/Lib/lib-tk/Dialog.py
+++ b/Lib/lib-tk/Dialog.py
@@ -1,7 +1,7 @@
 # dialog.py -- Tkinter interface to the tk_dialog script.
 
-from tkinter import *
-from tkinter import _cnfmerge
+from Tkinter import *
+from Tkinter import _cnfmerge
 
 if TkVersion <= 3.6:
     DIALOG_ICON = 'warning'