bpo-21624: IDLE -- minor htest fixes (#2575)

diff --git a/Lib/idlelib/config_key.py b/Lib/idlelib/config_key.py
index fc6e341..5556b76 100644
--- a/Lib/idlelib/config_key.py
+++ b/Lib/idlelib/config_key.py
@@ -293,5 +293,6 @@
 if __name__ == '__main__':
     import unittest
     unittest.main('idlelib.idle_test.test_config_key', verbosity=2, exit=False)
+
     from idlelib.idle_test.htest import run
     run(GetKeysDialog)