Check against black

.circleci/config.yml

@@ -11,3 +11,4 @@ jobs:
             - run: env/bin/pip install -e .
             - run: env/bin/pip install -r dev-requirements.txt
             - run: env/bin/python setup.py test
+            - run: env/bin/black tests ipc_unix

tests/test_basic.py

@@ -1,5 +1,6 @@
 from unittest import TestCase
 
+
 class BasicTestCase(TestCase):
     def test_something_basic(self):
         self.assertTrue(True)