Fix minor linting issue

Author: Harivallabha

pymc3/tests/test_distributions_random.py

@@ -506,6 +506,7 @@ class TestGeometric(BaseTestCases.BaseTestCase):
     distribution = pm.Geometric
     params = {"p": 0.5}
 
+
 class TestHyperGeometric(BaseTestCases.BaseTestCase):
     distribution = pm.HyperGeometric
     params = {"N": 50, "n": 25, "k": 10}