Merge pull request #2511 from ibraheemdev/patch-1

Update 16-11 to use method call expression for `clone`

Author: steveklabnik

listings/ch16-fearless-concurrency/listing-16-11/src/main.rs

@@ -8,7 +8,7 @@ fn main() {
 
     let (tx, rx) = mpsc::channel();
 
-    let tx1 = mpsc::Sender::clone(&tx);
+    let tx1 = tx.clone();
     thread::spawn(move || {
         let vals = vec![
             String::from("hi"),