Apply new format to snippets and template

snippets/tail.md

@@ -5,7 +5,7 @@ tags: array,beginner
 
 Returns all elements in an array except for the first one.
 
-Return `Array.prototype.slice(1)` if the array's `length` is more than `1`, otherwise, return the whole array.
+- Return `Array.prototype.slice(1)` if the array's `length` is more than `1`, otherwise, return the whole array.
 
 ```js
 const tail = arr => (arr.length > 1 ? arr.slice(1) : arr);
@@ -14,4 +14,4 @@ const tail = arr => (arr.length > 1 ? arr.slice(1) : arr);
 ```js
 tail([1, 2, 3]); // [2,3]
 tail([1]); // [1]
-```
+```