message: Replace eprintln! with writeln!(stderr()
diff: @@ -71,7 +71,7 @@ fn main() {
  let handle = core.handle();
  let ctrl_c = tokio_signal::ctrl_c(&handle).flatten_stream();
  let signal_handler = ctrl_c.for_each(|()| {
  - eprintln!("ion: received SIGINT (Ctrl+C)");
  + let _ = writeln!(stderr(), "ion: received SIGINT (Ctrl+C)");
  let _ = sigint_tx.send(true);
  Ok(())
  });
  