update snippets 62-78

snippets/isEven.md

@@ -7,5 +7,8 @@ Returns `true` if the number is even, `false` if the number is odd.
 
 ```js
 const isEven = num => num % 2 === 0;
-// isEven(3) -> false
+```
+
+```js
+isEven(3) -> false
 ```