Remove support for python 3.8 (#17908)

### Pull Request Checklist

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* [X] Pull request is based on the develop branch
* [X] Pull request includes a [changelog
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- Be a short description of your change which makes sense to users.
"Fixed a bug that prevented receiving messages from other servers."
instead of "Moved X method from `EventStore` to `EventWorkerStore`.".
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* [X] [Code
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[linters](https://element-hq.github.io/synapse/latest/development/contributing_guide.html#run-the-linters))

---------

Co-authored-by: Andrew Morgan <1342360+anoadragon453@users.noreply.github.com>

1 files changed, 19 insertions, 14 deletions

diff --git a/tests/storage/test_stream.py b/tests/storage/test_stream.py

index ed5f286243..38a56419f3 100644
--- a/tests/storage/test_stream.py
+++ b/tests/storage/test_stream.py
@@ -1465,20 +1465,25 @@ class GetCurrentStateDeltaMembershipChangesForUserFederationTestCase(
             )
         )
 
-        with patch.object(
-            self.room_member_handler.federation_handler.federation_client,
-            "make_membership_event",
-            mock_make_membership_event,
-        ), patch.object(
-            self.room_member_handler.federation_handler.federation_client,
-            "send_join",
-            mock_send_join,
-        ), patch(
-            "synapse.event_auth._is_membership_change_allowed",
-            return_value=None,
-        ), patch(
-            "synapse.handlers.federation_event.check_state_dependent_auth_rules",
-            return_value=None,
+        with (
+            patch.object(
+                self.room_member_handler.federation_handler.federation_client,
+                "make_membership_event",
+                mock_make_membership_event,
+            ),
+            patch.object(
+                self.room_member_handler.federation_handler.federation_client,
+                "send_join",
+                mock_send_join,
+            ),
+            patch(
+                "synapse.event_auth._is_membership_change_allowed",
+                return_value=None,
+            ),
+            patch(
+                "synapse.handlers.federation_event.check_state_dependent_auth_rules",
+                return_value=None,
+            ),
         ):
             self.get_success(
                 self.room_member_handler.update_membership(