{"ast_node_type":"other","tokens":[{"end":83,"kind":"keyword","start":0,"text":"assert_eq!(\"12_345.67e14\","}]}
    assert_eq!("12_345.67e14", format_with_underscores("12345.67e14".to_string()));
    assert_eq!("0", format_with_underscores("0".to_string()));
    assert_eq!("-1_234.5678e10", format_with_underscores("-1234.5678e10".to_string()));