Consistent whitespace

snippets/initial.md

@@ -5,7 +5,7 @@ tags: array,beginner
 
 Returns all the elements of an array except the last one.
 
-- Use `Array.prototype.slice(0,-1)` to return all but the last element of the array.
+- Use `Array.prototype.slice(0, -1)` to return all but the last element of the array.
 
 ```js
 const initial = arr => arr.slice(0, -1);