Update use-arrow-functions-to-write-concise-anonymous-functions.english.md

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/use-arrow-functions-to-write-concise-anonymous-functions.english.md

@@ -63,6 +63,9 @@ var magic = function() {
 <section id='solution'>
 
 ```js
-// solution required
+const magic = () => {
+  "use strict";
+  return new Date();
+};
 ```
 </section>