Apply new format to snippets and template

snippets/mapKeys.md

@@ -5,8 +5,8 @@ tags: object,function,intermediate
 
 Creates an object with keys generated by running the provided function for each key and the same values as the provided object.
 
-Use `Object.keys(obj)` to iterate over the object's keys.
-Use `Array.prototype.reduce()` to create a new object with the same values and mapped keys using `fn`.
+- Use `Object.keys(obj)` to iterate over the object's keys.
+- Use `Array.prototype.reduce()` to create a new object with the same values and mapped keys using `fn`.
 
 ```js
 const mapKeys = (obj, fn) =>
@@ -18,4 +18,4 @@ const mapKeys = (obj, fn) =>
 
 ```js
 mapKeys({ a: 1, b: 2 }, (val, key) => key + val); // { a1: 1, b2: 2 }
-```
+```