Lint the contrib/ directory in CI and linting scripts, add synctl to linting script (#7914)

Run `isort`, `flake8` and `black` over the `contrib/` directory and `synctl` script. The latter was already being done in CI, but now the linting script does it too.

Fixes https://github.com/matrix-org/synapse/issues/7910

1 files changed, 6 insertions, 5 deletions

diff --git a/contrib/graph/graph2.py b/contrib/graph/graph2.py

index 4619f0e3c1..0980231e4a 100644
--- a/contrib/graph/graph2.py
+++ b/contrib/graph/graph2.py
@@ -13,12 +13,13 @@
 # limitations under the License.
 
 
-import sqlite3
-import pydot
+import argparse
 import cgi
-import json
 import datetime
-import argparse
+import json
+import sqlite3
+
+import pydot
 
 from synapse.events import FrozenEvent
 from synapse.util.frozenutils import unfreeze
@@ -98,7 +99,7 @@ def make_graph(db_name, room_id, file_prefix, limit):
         for prev_id, _ in event.prev_events:
             try:
                 end_node = node_map[prev_id]
-            except:
+            except Exception:
                 end_node = pydot.Node(name=prev_id, label="<<b>%s</b>>" % (prev_id,))
 
                 node_map[prev_id] = end_node