black: Apply to tests

Author: evanpurkhiser

src/croniter/tests/base.py

@@ -5,9 +5,10 @@
 
 
 class TestCase(unittest.TestCase):
-    '''
+    """
     We use this base class for all the tests in this package.
     If necessary, we can put common utility or setup code in here.
-    '''
+    """
+
 
 # vim:set ft=python: