Stupid little iota of an idea

[Andrej Mitrovic]

This would make more sense as a comparison:

    auto iot1 = [iota(0, 10, 2), iota(0, 10, 3)];
    auto iot2 = [2 : iota(0, 10, 2), 3 : iota(0, 10, 3)];

    auto syn1 = [[0..10 : 2], [0..10 : 3]];
    auto syn2 = [2: [0..10 : 2], 3: [0..10 : 3]];

    // iot1 == [[0, 2, 4, 6, 8], [0, 3, 6, 9]]
    // iot2 == 2:[0, 2, 4, 6, 8] 3:[0, 3, 6, 9]

    assert(iot1 == syn1);
    assert(iot2 == syn2);