Fix formatting

Author: tamuri

src/tlo/notify.py

@@ -17,6 +17,7 @@ def on_notification(data):
 notifier.add_listener("simulation.on_start", on_notification)
 """
 
+
 class Notifier:
     """
     A simple synchronous notification dispatcher supporting listeners.
@@ -59,6 +60,6 @@ def dispatch(self, notification_key, data=None):
             for listener in list(self.listeners[notification_key]):
                 listener(data)
 
+
 # Create a global notifier instance
 notifier = Notifier()
-

tests/test_notify.py

@@ -1,5 +1,6 @@
 from tlo.notify import notifier
 
+
 def test_notifier():
     # in listening code
     received_data = []
@@ -20,4 +21,3 @@ def callback(data):
     notifier.dispatch("test.signal", data={"value": 100})
 
     assert len(received_data) == 1  # No new data
-