Use literal string interpolation in integrations R-S (f-strings) (#26392)

homeassistant/components/rejseplanen/sensor.py

@@ -220,7 +220,7 @@ class PublicTransportData:
                 and due_at_time is not None
                 and route is not None
             ):
-                due_at = "{} {}".format(due_at_date, due_at_time)
+                due_at = f"{due_at_date} {due_at_time}"
 
                 departure_data = {
                     ATTR_DUE_IN: due_in_minutes(due_at),