Morellet’s random lines Error on last test "Mind the sign"

Hi there,

I tried to solve the puzzle Morellet’s random lines. I was thinking I successed because I passed all the tests in the interactive window but when I submit, he failed on the last one “Mind the sign”.
Is people have met the same anoying problem ? Or I messed something in my code ?

Thanks in advance for your help guys.

A post was merged into an existing topic: Morellet’s random lines puzzle