Update 'examples/doc_example.rs'

close #3

examples/doc_example.rs

@@ -1,7 +1,6 @@
 use shared::Shared;
 
-// #[derive(Clone)]
-// Clone is no longer needed as of v0.2.0
+#[derive(Debug)]
 struct Person {
     pub name: String,
     pub age: u16,
@@ -24,7 +23,7 @@ async fn main() {
         // Direct access
         let person = shared_data.lock().await;
         println!("Before:");
-        println!("Person{{name: {}, age: {}}}", person.name, person.age);
+        println!("{:?}", person);
     }
 
     // Calling
@@ -33,6 +32,6 @@ async fn main() {
     {
         let person = shared_data.lock().await;
         println!("After:");
-        println!("Person{{name: {}, age: {}}}", person.name, person.age);
+        println!("{:?}", person);
     }
 }