Apply new format to snippets and template

snippets/symmetricDifferenceWith.md

@@ -5,7 +5,7 @@ tags: array,function,intermediate
 
 Returns the symmetric difference between two arrays, using a provided function as a comparator.
 
-Use `Array.prototype.filter()` and `Array.prototype.findIndex()` to find the appropriate values.
+- Use `Array.prototype.filter()` and `Array.prototype.findIndex()` to find the appropriate values.
 
 ```js
 const symmetricDifferenceWith = (arr, val, comp) => [
@@ -20,4 +20,4 @@ symmetricDifferenceWith(
   [1.9, 3, 0, 3.9],
   (a, b) => Math.round(a) === Math.round(b)
 ); // [1, 1.2, 3.9]
-```
+```