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

3 files changed, 8 insertions, 9 deletions

diff --git a/synapse/storage/engines/_base.py b/synapse/storage/engines/_base.py
index d6d632dc10..cca839c70f 100644
--- a/synapse/storage/engines/_base.py
+++ b/synapse/storage/engines/_base.py
@@ -94,14 +94,12 @@ class BaseDatabaseEngine(Generic[ConnectionType], metaclass=abc.ABCMeta):
     @property
     @abc.abstractmethod
     def server_version(self) -> str:
-        """Gets a string giving the server version. For example: '3.22.0'
-        """
+        """Gets a string giving the server version. For example: '3.22.0'"""
         ...
 
     @abc.abstractmethod
     def in_transaction(self, conn: Connection) -> bool:
-        """Whether the connection is currently in a transaction.
-        """
+        """Whether the connection is currently in a transaction."""
         ...
 
     @abc.abstractmethod
diff --git a/synapse/storage/engines/postgres.py b/synapse/storage/engines/postgres.py
index 7719ac32f7..80a3558aec 100644
--- a/synapse/storage/engines/postgres.py
+++ b/synapse/storage/engines/postgres.py
@@ -138,8 +138,7 @@ class PostgresEngine(BaseDatabaseEngine):
 
     @property
     def supports_using_any_list(self):
-        """Do we support using `a = ANY(?)` and passing a list
-        """
+        """Do we support using `a = ANY(?)` and passing a list"""
         return True
 
     def is_deadlock(self, error):
diff --git a/synapse/storage/engines/sqlite.py b/synapse/storage/engines/sqlite.py
index b3d1834efb..b87e7798da 100644
--- a/synapse/storage/engines/sqlite.py
+++ b/synapse/storage/engines/sqlite.py
@@ -29,7 +29,10 @@ class Sqlite3Engine(BaseDatabaseEngine["sqlite3.Connection"]):
         super().__init__(database_module, database_config)
 
         database = database_config.get("args", {}).get("database")
-        self._is_in_memory = database in (None, ":memory:",)
+        self._is_in_memory = database in (
+            None,
+            ":memory:",
+        )
 
         if platform.python_implementation() == "PyPy":
             # pypy's sqlite3 module doesn't handle bytearrays, convert them
@@ -63,8 +66,7 @@ class Sqlite3Engine(BaseDatabaseEngine["sqlite3.Connection"]):
 
     @property
     def supports_using_any_list(self):
-        """Do we support using `a = ANY(?)` and passing a list
-        """
+        """Do we support using `a = ANY(?)` and passing a list"""
         return False
 
     def check_database(self, db_conn, allow_outdated_version: bool = False):