Apply new format to snippets and template

snippets/mapObject.md

@@ -5,8 +5,8 @@ tags: array,object,intermediate
 
 Maps the values of an array to an object using a function, where the key-value pairs consist of the original value as the key and the result of the function as the value.
 
-Use `Array.prototype.reduce()` to apply `fn` to each element in `arr` and combine the results into an object.
-Use `el` as the key for each property and the result of `fn` as the value.
+- Use `Array.prototype.reduce()` to apply `fn` to each element in `arr` and combine the results into an object.
+- Use `el` as the key for each property and the result of `fn` as the value.
 
 ```js
 const mapObject = (arr, fn) =>