Completed exercise up to Traits

exercises/15_traits/traits1.rs

@@ -6,6 +6,14 @@ trait AppendBar {
 
 impl AppendBar for String {
     // TODO: Implement `AppendBar` for the type `String`.
+    fn append_bar(self) -> Self{
+        // In this i need to put mut in front of the parameter
+        // self.push_str("Bar");
+        // self
+
+        // This way is more readable
+        self + "Bar"
+    }
 }
 
 fn main() {