Appease PEP8

synapse/storage/engines/__init__.py

@@ -14,6 +14,8 @@
 # limitations under the License.
 
 from ._base import IncorrectDatabaseSetup
+assert IncorrectDatabaseSetup  # Appease PEP8
+
 from .postgres import PostgresEngine
 from .sqlite3 import Sqlite3Engine