{"ast_node_type":"other","tokens":[{"end":77,"kind":"keyword","start":0,"text":"assert_eq!(\"123_456_789.1\","}]}
    assert_eq!("123_456_789.1", f64p1_with_underscores(123456789.123456789));
    assert_eq!("-100_000.0", f64p1_with_underscores(-100_000f64));
    assert_eq!("-123_456_789.1", f64p1_with_underscores(-123456789.123456789));