When there's no query string in the request, `_get_query(asgi_scope)` returns `None`, which is unconditionally assigned to `attributes["http.query"]`. When this `None` value is later passed through `format_attribute()` in `set_attribute()`, it becomes the string `"None"` via `safe_repr()`. This causes requests without query strings to have `http.query` set to the literal string `"None"` instead of omitting the attribute entirely.