{"ast_node_type":"other","tokens":[{"end":74,"kind":"keyword","start":0,"text":"println!(\"Hello"}]}
    println!("Hello {} is {number:.prec$}", "x", prec = 5, number = 0.01);
    println!("Hello {} is {2:.*}",   "x", 5, 0.01);
    println!("{}, `{name:.*}` has 3 fractional digits", "Hello", 3, name=1234.56);