Merge pull request #690 from rafales/ticket_19711

Fixed #19711 -- Typo in django.test.simple.__all__

django/test/simple.py

@@ -11,7 +11,7 @@ from django.utils import unittest
 from django.utils.importlib import import_module
 from django.utils.module_loading import module_has_submodule
 
-__all__ = ('DjangoTestSuiteRunner')
+__all__ = ('DjangoTestSuiteRunner',)
 
 # The module name for tests outside models.py
 TEST_MODULE = 'tests'