Enable flake8-bugbear, but disable most checks. (#9499)

* Adds B00 to ignored checks.
* Fixes remaining issues.

1 files changed, 3 insertions, 1 deletions

diff --git a/synapse/app/__init__.py b/synapse/app/__init__.py

index 4a9b0129c3..d1a2cd5e19 100644
--- a/synapse/app/__init__.py
+++ b/synapse/app/__init__.py
@@ -22,7 +22,9 @@ logger = logging.getLogger(__name__)
 try:
     python_dependencies.check_requirements()
 except python_dependencies.DependencyException as e:
-    sys.stderr.writelines(e.message)
+    sys.stderr.writelines(
+        e.message  # noqa: B306, DependencyException.message is a property
+    )
     sys.exit(1)