Update black, and run auto formatting over the codebase (#9381)

 - Update black version to the latest
 - Run black auto formatting over the codebase
    - Run autoformatting according to [`docs/code_style.md
`](https://github.com/matrix-org/synapse/blob/80d6dc9783aa80886a133756028984dbf8920168/docs/code_style.md)
 - Update `code_style.md` docs around installing black to use the correct version

1 files changed, 3 insertions, 6 deletions

diff --git a/synapse/handlers/user_directory.py b/synapse/handlers/user_directory.py
index 8aedf5072e..3dfb0a26c2 100644
--- a/synapse/handlers/user_directory.py
+++ b/synapse/handlers/user_directory.py
@@ -97,8 +97,7 @@ class UserDirectoryHandler(StateDeltasHandler):
         return results
 
     def notify_new_event(self) -> None:
-        """Called when there may be more deltas to process
-        """
+        """Called when there may be more deltas to process"""
         if not self.update_user_directory:
             return
 
@@ -134,8 +133,7 @@ class UserDirectoryHandler(StateDeltasHandler):
             )
 
     async def handle_user_deactivated(self, user_id: str) -> None:
-        """Called when a user ID is deactivated
-        """
+        """Called when a user ID is deactivated"""
         # FIXME(#3714): We should probably do this in the same worker as all
         # the other changes.
         await self.store.remove_from_user_dir(user_id)
@@ -172,8 +170,7 @@ class UserDirectoryHandler(StateDeltasHandler):
                 await self.store.update_user_directory_stream_pos(max_pos)
 
     async def _handle_deltas(self, deltas: List[Dict[str, Any]]) -> None:
-        """Called with the state deltas to process
-        """
+        """Called with the state deltas to process"""
         for delta in deltas:
             typ = delta["type"]
             state_key = delta["state_key"]