diff --git a/snippets/flatten.md b/snippets/flatten.md
index 708703f58..a4ca535b4 100644
--- a/snippets/flatten.md
+++ b/snippets/flatten.md
@@ -15,5 +15,5 @@ const flatten = (arr, depth = 1) =>
 ```
 
 ```js
-flatten([1, [2], 3, 4]); // [1,2,3,4]
+flatten([1, [2], 3, 4]); // [1, 2, 3, 4]
 ```