fix padding and lint

backend/db/crud.py

@@ -18,7 +18,7 @@ def get_waiting_time(place: str, db: Session):
     data = {"status": False, "waiting_time": None, "next_timetable": None}
     first_timeslot = get_timeslot(place, weekday, True, db)
     if first_timeslot and current_time < first_timeslot[0]:
-        data["next_timetable"] = f"{first_timeslot[0].hour}h{first_timeslot[0].minute}"
+        data["next_timetable"] = str(first_timeslot[0].time())[0:5]
         return data
     elif first_timeslot and current_time <= first_timeslot[1]:
         waiting_time = db.query(
@@ -35,7 +35,7 @@ def get_waiting_time(place: str, db: Session):
         return data
     second_timeslot = get_timeslot(place, weekday, False, db)
     if second_timeslot and current_time < second_timeslot[0]:
-        data["next_timetable"] = f"{second_timeslot[0].hour}h{second_timeslot[0].minute}"
+        data["next_timetable"] = str(second_timeslot[0].time())[0:5]
         return data
     elif second_timeslot and current_time <= second_timeslot[1]:
         waiting_time = db.query(