def x = [1,2,3,4,5] assert (x << 6) == [6,7,8,9,10] // Output: // // Assertion failed: // assert (x << 6) == [6,7,8,9,10] // | | | // | | false // | [1, 2, 3, 4, 5, 6] // [1, 2, 3, 4, 5, 6]
