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// { "preopens": { "/scratch": "scratch" }, "files": { "scratch/file": "file" } }
use std::io::Write;
fn main() {  let mut file = std::fs::File::create("/scratch/file").unwrap();  assert_eq!(file.write(b"fi").unwrap(), 2);  assert_eq!(file.write(b"le").unwrap(), 2);}