fix/Clarification for code example

Clarification needed for Functional Programming code example, in the challenge Add Elements to the End of an Array Using concat Instead of push

challenges/02-javascript-algorithms-and-data-structures/functional-programming.json

@@ -831,7 +831,7 @@
       "description": [
         "Functional programming is all about creating and using non-mutating functions.",
         "The last challenge introduced the <code>concat</code> method as a way to combine arrays into a new one without mutating the original arrays. Compare <code>concat</code> to the <code>push</code> method. <code>Push</code> adds an item to the end of the same array it is called on, which mutates that array. Here's an example:",
-        "<blockquote>var arr = [1, 2, 3];<br>arr.push([4, 5, 6]);<br>// arr is changed to [1, 2, 3, 4, 5, 6]<br>// Not the functional programming way</blockquote>",
+        "<blockquote>var arr = [1, 2, 3];<br>arr.push([4, 5, 6]);<br>// arr is changed to [1, 2, 3, [4, 5, 6]]<br>// Not the functional programming way</blockquote>",
         "<code>Concat</code> offers a way to add new items to the end of an array without any mutating side effects.",
         "<hr>",
         "Change the <code>nonMutatingPush</code> function so it uses <code>concat</code> to add <code>newItem</code> to the end of <code>original</code> instead of <code>push</code>. The function should return an array."