Merge: Revise and synchronize idle_test.test_configdialog.

diff --cc Lib/idlelib/idle_test/test_configdialog.py
index e4e1a319f7a8179db96d0f3de5c33138be44d819,b063601b2709326d330851be7f1389b380d6501c..4f5d216af847632bd93a03d2beee41982b80eee3
--- 1/Lib/idlelib/idle_test/test_configdialog.py
--- 2/Lib/idlelib/idle_test/test_configdialog.py
+++ b/Lib/idlelib/idle_test/test_configdialog.py
@@@ -1,13 -1,14 +1,14 @@@
 -'''Test idlelib.configDialog.
 +'''Test idlelib.configdialog.
  
- Coverage: 46% just by creating dialog. The other half is change code.
+ Coverage: 46% just by creating dialog.
+ The other half is code for working with user customizations.
  '''
- import unittest
 -from idlelib.configDialog import ConfigDialog  # always test import
++from idlelib.configdialog import ConfigDialog  # always test import
  from test.support import requires
+ requires('gui')
  from tkinter import Tk
- from idlelib.configdialog import ConfigDialog
- from idlelib.macosx import _initializeTkVariantTests
- 
+ import unittest
 -from idlelib import macosxSupport as macosx
++from idlelib import macosx
  
  class ConfigDialogTest(unittest.TestCase):