Updated examples

snippets/tail.md

@@ -9,6 +9,6 @@ const tail = arr => arr.length > 1 ? arr.slice(1) : arr;
 ```
 
 ```js
-tail([1,2,3]) -> [2,3]
-tail([1]) -> [1]
+tail([1,2,3]) // [2,3]
+tail([1]) // [1]
 ```