message: fix more doc bugs
diff: @@ -170,14 +170,14 @@ async fn main() -> Result<(), ClientError> {
  let model = Model::from_primitives(vec![0; len].into_iter()).unwrap();
  let mut clients = Vec::with_capacity(20_usize);
  - for id in 0..clients.len() {
  + for id in 0..20 {
  let mut client = Client::new_with_addr(1, id, "http://127.0.0.1:8081")?;
  client.local_model = Some(model.clone());
  let join_hdl = tokio::spawn(async move {
  tokio::select! {
  _ = signal::ctrl_c() => {}
  result = client.start() => {
  - error!("{:?}", result);
  + println!("{:?}", result);
  }
  }
  });
  