Improved chunk snippet, build README

snippets/chunk-array.md

@@ -1,13 +1,11 @@
-### Chunk Array
+### Chunk array
 
 Use `Array.apply()` to create a new array, that fits the number of chunks that will be produced.
 Use `Array.map()` to map each element of the new array to a chunk the length of `size`.
 If the original array can't be split evenly, the final chunk will contain the remaining elements.
 
 ```js
-const chunk = (arr, size) => 
+const chunk = (arr, size) =>
   Array.apply(null, {length: Math.ceil(arr.length/size)}).map((v, i) => arr.slice(i*size, i*size+size));
-
-// const myArray = [2, 2, 2, 2, 2, 2, 3, 2, 3, 2, 3, 2, 2];
-// chunk(myArray, 3) -> [ [ 2, 2, 2 ], [ 2, 2, 2 ], [ 3, 2, 3 ], [ 2, 3, 2 ], [ 2 ] ]
+// chunk([1,2,3,4,5], 2) -> [[1,2],[3,4],5]
 ```