Apply black

Author: rly

tests/test_alter.py

@@ -93,4 +93,4 @@ def verify_alter(table, attribute_sql):
     verify_alter(table=Parent.Child, attribute_sql="`child_id` .* DEFAULT NULL")
     verify_alter(
         table=Parent.Grandchild, attribute_sql="`grandchild_id` .* DEFAULT NULL"
-    )
+    )