STY: fixed autopep8 errors

unittests/test_apiutils.py

@@ -231,6 +231,7 @@ def test_compare_special_properties():
         assert len(diff_r1["properties"]) == 0
         assert len(diff_r2["properties"]) == 0
 
+
 def test_copy_entities():
     r = db.Record(name="A")
     r.add_parent(name="B")