IDLE: Fix typos in docs and comments (GH-13749)

diff --git a/Lib/idlelib/configdialog.py b/Lib/idlelib/configdialog.py
index 4aaec13..807ff60 100644
--- a/Lib/idlelib/configdialog.py
+++ b/Lib/idlelib/configdialog.py
@@ -199,7 +199,7 @@
     def help(self):
         """Create textview for config dialog help.
 
-        Attrbutes accessed:
+        Attributes accessed:
             note
 
         Methods: