Function string_escapes

nodedb/src/control/promql/lexer.rs:332–335

()

    #[test]
    fn string_escapes() {
        let tokens = tokenize(r#""hello\nworld""#).unwrap();
        assert_eq!(tokens[0], Token::String("hello\nworld".into()));
    }

    #[test]
    fn duration_compound() {