{"ast_node_type":"variable","tokens":[{"end":64,"kind":"keyword","start":0,"text":"let"}]}
        let (res, endings) = LineEndings::normalize(src.into());
        let src = "\r\na\r\n\r\nb\r\nc\r\n\r\n\r\n\r\n";
        assert_eq!(endings, LineEndings::Dos);