From c1bca3140c87b402f38e49f70ddd48a81225d43a Mon Sep 17 00:00:00 2001
From: Patrik Tulach <patrik.tulach@student.tuke.sk>
Date: Mon, 28 Sep 2026 20:50:20 +0200
Subject: [PATCH] u2

---
 u2/list_ops.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/u2/list_ops.py b/u2/list_ops.py
index 318f4ea..9bf52c9 100644
--- a/u2/list_ops.py
+++ b/u2/list_ops.py
@@ -9,7 +9,7 @@ def append(list1, list2):
 def concat(lists):
     result = []
     for list in lists:
-        append(result, list)
+        result = append(result, list)
     return result
 
 def filter(function, list):