Apply new format to snippets and template

snippets/reverseString.md

@@ -5,8 +5,8 @@ tags: string,array,beginner
 
 Reverses a string.
 
-Use the spread operator (`...`) and `Array.prototype.reverse()` to reverse the order of the characters in the string.
-Combine characters to get a string using `String.prototype.join('')`.
+- Use the spread operator (`...`) and `Array.prototype.reverse()` to reverse the order of the characters in the string.
+- Combine characters to get a string using `String.prototype.join('')`.
 
 ```js
 const reverseString = str => [...str].reverse().join('');
@@ -14,4 +14,4 @@ const reverseString = str => [...str].reverse().join('');
 
 ```js
 reverseString('foobar'); // 'raboof'
-```
+```