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, 6 insertions, 2 deletions

diff --git a/synapse/rest/client/v1/room.py b/synapse/rest/client/v1/room.py

index 90fd98c53e..9a1df30c29 100644
--- a/synapse/rest/client/v1/room.py
+++ b/synapse/rest/client/v1/room.py
@@ -362,7 +362,9 @@ class PublicRoomListRestServlet(TransactionRestServlet):
                 parse_and_validate_server_name(server)
             except ValueError:
                 raise SynapseError(
-                    400, "Invalid server name: %s" % (server,), Codes.INVALID_PARAM,
+                    400,
+                    "Invalid server name: %s" % (server,),
+                    Codes.INVALID_PARAM,
                 )
 
             try:
@@ -413,7 +415,9 @@ class PublicRoomListRestServlet(TransactionRestServlet):
                 parse_and_validate_server_name(server)
             except ValueError:
                 raise SynapseError(
-                    400, "Invalid server name: %s" % (server,), Codes.INVALID_PARAM,
+                    400,
+                    "Invalid server name: %s" % (server,),
+                    Codes.INVALID_PARAM,
                 )
 
             try: