Oh, okay

Duplicate of the kata you linked. The difference is too small to be worth of another kata.

Thank you for your comment
Tests fixed
However, please tell me a duplicate of what?

• Sample tests have errors
• First sample test is incorrect - test.assert_equals(sum_n_arrays([1,2,5],[1,2]),[1,3,6]) - should be [1, 3, 7]
• Duplicate