// Run with `rust run hello.rs`

fn greeter(greeting_text: &str) {
    println(fmt!("Hello %s!", greeting_text));
}

fn main() {
    greeter("World");
}

// Run with `rust run hello.rs`

fn main() {
    println("Hello World!");
}

--- 
+++ 
@@ -1,5 +1,9 @@
 // Run with `rust run hello.rs`
 
+fn greeter(greeting_text: &str) {
+    println(fmt!("Hello %s!", greeting_text));
+}
+
 fn main() {
-    println("Hello World!");
+    greeter("World");
 }
Update rust example to confort to the requirements stated in the README
