update snippets 47-62

snippets/initial.md

@@ -6,5 +6,8 @@ Use `arr.slice(0,-1)` to return all but the last element of the array.
 
 ```js
 const initial = arr => arr.slice(0, -1);
-// initial([1,2,3]) -> [1,2]
+```
+
+```js
+initial([1,2,3]) -> [1,2]
 ```