Print string repr in io example

examples/io.rs

@@ -39,10 +39,9 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
                         break;
                     }
 
-                    println!("{:?}: {:?}", std::thread::current().id(), &buffer[0..n]);
-
                     if let Ok(s) = std::str::from_utf8(&buffer[0..n]) {
                         let mut string = s.trim().chars().rev().collect::<String>();
+                        println!("{:?}: {}", std::thread::current().id(), string);
                         string.push('\n');
 
                         if stream.write_all(string.as_bytes()).await.is_err() {