Clean up asm code a bit. - Use vector instead of Array, reducing allocations. - Use vectors instead of deques since we only push_back and index. - Remove redundant typedefs of iterators. - Comment out unused variable (used only in commented-out GDC code). - A few whitespace changes.

module bug56;

void main()
{
    int[] a;
    a = [1,2,3];
    {int[] b = [4,5,6];}
}