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, 25 insertions, 11 deletions

diff --git a/tests/rest/client/v1/utils.py b/tests/rest/client/v1/utils.py
index b1333df82d..8231a423f3 100644
--- a/tests/rest/client/v1/utils.py
+++ b/tests/rest/client/v1/utils.py
@@ -166,9 +166,12 @@ class RestHelper:
             json.dumps(data).encode("utf8"),
         )
 
-        assert int(channel.result["code"]) == expect_code, (
-            "Expected: %d, got: %d, resp: %r"
-            % (expect_code, int(channel.result["code"]), channel.result["body"])
+        assert (
+            int(channel.result["code"]) == expect_code
+        ), "Expected: %d, got: %d, resp: %r" % (
+            expect_code,
+            int(channel.result["code"]),
+            channel.result["body"],
         )
 
         self.auth_user_id = temp_id
@@ -201,9 +204,12 @@ class RestHelper:
             json.dumps(content).encode("utf8"),
         )
 
-        assert int(channel.result["code"]) == expect_code, (
-            "Expected: %d, got: %d, resp: %r"
-            % (expect_code, int(channel.result["code"]), channel.result["body"])
+        assert (
+            int(channel.result["code"]) == expect_code
+        ), "Expected: %d, got: %d, resp: %r" % (
+            expect_code,
+            int(channel.result["code"]),
+            channel.result["body"],
         )
 
         return channel.json_body
@@ -251,9 +257,12 @@ class RestHelper:
 
         channel = make_request(self.hs.get_reactor(), self.site, method, path, content)
 
-        assert int(channel.result["code"]) == expect_code, (
-            "Expected: %d, got: %d, resp: %r"
-            % (expect_code, int(channel.result["code"]), channel.result["body"])
+        assert (
+            int(channel.result["code"]) == expect_code
+        ), "Expected: %d, got: %d, resp: %r" % (
+            expect_code,
+            int(channel.result["code"]),
+            channel.result["body"],
         )
 
         return channel.json_body
@@ -447,7 +456,10 @@ class RestHelper:
         return self.complete_oidc_auth(oauth_uri, cookies, user_info_dict)
 
     def complete_oidc_auth(
-        self, oauth_uri: str, cookies: Mapping[str, str], user_info_dict: JsonDict,
+        self,
+        oauth_uri: str,
+        cookies: Mapping[str, str],
+        user_info_dict: JsonDict,
     ) -> FakeChannel:
         """Mock out an OIDC authentication flow
 
@@ -491,7 +503,9 @@ class RestHelper:
             (expected_uri, resp_obj) = expected_requests.pop(0)
             assert uri == expected_uri
             resp = FakeResponse(
-                code=200, phrase=b"OK", body=json.dumps(resp_obj).encode("utf-8"),
+                code=200,
+                phrase=b"OK",
+                body=json.dumps(resp_obj).encode("utf-8"),
             )
             return resp