fix(iter::skip): Optimize `next` and `nth` implementations of `Skip` This avoids calling nth/next or nth/nth to first skip elements and then get the next one (unless necessary due to usize overflow).
fix(iter::skip): Optimize `next` and `nth` implementations of `Skip` This avoids calling nth/next or nth/nth to first skip elements and then get the next one (unless necessary due to usize overflow).