15.3 Python GeneratePermutation bug in tests when submitting wrong solution

[pp5x]

What?

On exercise of 15.3 GeneratePermutation page 230 the solution code and EPIJudge are reversing the swap in the for loop.

EPIJudge/epi_judge_python_solutions/permutations.py

Line 17 in b736406

A[i], A[j] = A[j], A[i]

I managed to pass the tests without that second swap by generating this list instead:

[[0, 1, 2], [0, 2, 1], [2, 0, 1], [2, 1, 0], [0, 1, 2], [0, 2, 1]]

There must be an issue in the functions checking the list content as there are duplicated results.

How?

Delete the second swap and see all the tests passing.