style: fix pyink style warnings

Author: sindrigunnars

tests/unittests/sessions/test_session_service.py

@@ -117,7 +117,7 @@ async def test_session_state(service_type):
   app_name = 'my_app'
   user_id_1 = 'user1'
   user_id_2 = 'user2'
-  user_id_malicious = "malicious"
+  user_id_malicious = 'malicious'
   session_id_11 = 'session11'
   session_id_12 = 'session12'
   session_id_2 = 'session2'
@@ -196,7 +196,7 @@ async def test_session_state(service_type):
   session_mismatch = await session_service.get_session(
       app_name=app_name, user_id=user_id_malicious, session_id=session_id_11
   )
-  
+
   assert len(session_mismatch.events) == 0