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, 14 insertions, 9 deletions

diff --git a/synapse/push/httppusher.py b/synapse/push/httppusher.py
index e048b0d59e..b9d3da2e0a 100644
--- a/synapse/push/httppusher.py
+++ b/synapse/push/httppusher.py
@@ -176,8 +176,10 @@ class HttpPusher(Pusher):
         Never call this directly: use _process which will only allow this to
         run once per pusher.
         """
-        unprocessed = await self.store.get_unread_push_actions_for_user_in_range_for_http(
-            self.user_id, self.last_stream_ordering, self.max_stream_ordering
+        unprocessed = (
+            await self.store.get_unread_push_actions_for_user_in_range_for_http(
+                self.user_id, self.last_stream_ordering, self.max_stream_ordering
+            )
         )
 
         logger.info(
@@ -204,12 +206,14 @@ class HttpPusher(Pusher):
                 http_push_processed_counter.inc()
                 self.backoff_delay = HttpPusher.INITIAL_BACKOFF_SEC
                 self.last_stream_ordering = push_action["stream_ordering"]
-                pusher_still_exists = await self.store.update_pusher_last_stream_ordering_and_success(
-                    self.app_id,
-                    self.pushkey,
-                    self.user_id,
-                    self.last_stream_ordering,
-                    self.clock.time_msec(),
+                pusher_still_exists = (
+                    await self.store.update_pusher_last_stream_ordering_and_success(
+                        self.app_id,
+                        self.pushkey,
+                        self.user_id,
+                        self.last_stream_ordering,
+                        self.clock.time_msec(),
+                    )
                 )
                 if not pusher_still_exists:
                     # The pusher has been deleted while we were processing, so
@@ -290,7 +294,8 @@ class HttpPusher(Pusher):
                     # for sanity, we only remove the pushkey if it
                     # was the one we actually sent...
                     logger.warning(
-                        ("Ignoring rejected pushkey %s because we didn't send it"), pk,
+                        ("Ignoring rejected pushkey %s because we didn't send it"),
+                        pk,
                     )
                 else:
                     logger.info("Pushkey %s was rejected: removing", pk)