Use type hinting generics in standard collections (#19046)

aka PEP 585, added in Python 3.9

 - https://peps.python.org/pep-0585/
 - https://docs.astral.sh/ruff/rules/non-pep585-annotation/

tests/test_event_auth.py

@@ -20,7 +20,7 @@
 #
 
 import unittest
-from typing import Any, Collection, Dict, Iterable, List, Optional
+from typing import Any, Collection, Iterable, Optional
 
 from parameterized import parameterized
 
@@ -39,7 +39,7 @@ class _StubEventSourceStore:
     """A stub implementation of the EventSourceStore"""
 
     def __init__(self) -> None:
-        self._store: Dict[str, EventBase] = {}
+        self._store: dict[str, EventBase] = {}
 
     def add_event(self, event: EventBase) -> None:
         self._store[event.event_id] = event
@@ -54,7 +54,7 @@ class _StubEventSourceStore:
         redact_behaviour: EventRedactBehaviour,
         get_prev_content: bool = False,
         allow_rejected: bool = False,
-    ) -> Dict[str, EventBase]:
+    ) -> dict[str, EventBase]:
         assert allow_rejected
         assert not get_prev_content
         assert redact_behaviour == EventRedactBehaviour.as_is
@@ -745,7 +745,7 @@ class EventAuthTestCase(unittest.TestCase):
         test_room_v10_rejects_string_power_levels above handles the string case.
         """
 
-        def create_event(pl_event_content: Dict[str, Any]) -> EventBase:
+        def create_event(pl_event_content: dict[str, Any]) -> EventBase:
             return make_event_from_dict(
                 {
                     "room_id": TEST_ROOM_ID,
@@ -759,7 +759,7 @@ class EventAuthTestCase(unittest.TestCase):
                 room_version=RoomVersions.V10,
             )
 
-        contents: Iterable[Dict[str, Any]] = [
+        contents: Iterable[dict[str, Any]] = [
             {"notifications": {"room": None}},
             {"users": {"@alice:wonderland": []}},
             {"users_default": {}},
@@ -861,7 +861,7 @@ def _alias_event(room_version: RoomVersion, sender: str, **kwargs: Any) -> Event
 
 def _build_auth_dict_for_room_version(
     room_version: RoomVersion, auth_events: Iterable[EventBase]
-) -> List:
+) -> list:
     if room_version.event_format == EventFormatVersions.ROOM_V1_V2:
         return [(e.event_id, "not_used") for e in auth_events]
     else: