Lint after updating black

tests/unit/test_rules_referral.py

@@ -1,4 +1,3 @@
-
 import pytest
 
 from tests.factories.rule import ReferralRuleFactory
@@ -7,9 +6,7 @@ from tests.factories.segment import SegmentFactory
 
 @pytest.mark.django_db
 def test_referral_rule_create():
-    segment = SegmentFactory(name='Referral')
-    referral_rule = ReferralRuleFactory(
-        regex_string='test.test',
-        segment=segment)
+    segment = SegmentFactory(name="Referral")
+    referral_rule = ReferralRuleFactory(regex_string="test.test", segment=segment)
 
-    assert referral_rule.regex_string == 'test.test'
+    assert referral_rule.regex_string == "test.test"