mypy: Enable new error explicit-override.

Signed-off-by: Anders Kaseorg <anders@zulip.com>

zilencer/management/commands/render_messages.py

@@ -4,6 +4,7 @@ from typing import Any, Iterator
 import orjson
 from django.core.management.base import BaseCommand, CommandParser
 from django.db.models import QuerySet
+from typing_extensions import override
 
 from zerver.lib.message import render_markdown
 from zerver.models import Message
@@ -24,11 +25,13 @@ class Command(BaseCommand):
     Usage: ./manage.py render_messages <destination> [--amount=10000]
     """
 
+    @override
     def add_arguments(self, parser: CommandParser) -> None:
         parser.add_argument("destination", help="Destination file path")
         parser.add_argument("--amount", default=100000, help="Number of messages to render")
         parser.add_argument("--latest_id", default=0, help="Last message id to render")
 
+    @override
     def handle(self, *args: Any, **options: Any) -> None:
         dest_dir = os.path.realpath(os.path.dirname(options["destination"]))
         amount = int(options["amount"])