Tkinter, step 2: adapt imports.
diff --git a/Lib/idlelib/aboutDialog.py b/Lib/idlelib/aboutDialog.py
index 43a1313..cfccc0f 100644
--- a/Lib/idlelib/aboutDialog.py
+++ b/Lib/idlelib/aboutDialog.py
@@ -2,7 +2,7 @@
 
 """
 
-from Tkinter import *
+from tkinter import *
 import os
 
 from idlelib import textView