Closes small sentinel gaps between consecutive sorted bands defensively (e.g. [0, 0.3999) and [0.4, 0.6999) -> [0, 0.4) and [0.4, 0.7)).
Closes small sentinel gaps between consecutive sorted bands defensively (e.g. [0, 0.3999) and [0.4, 0.6999) -> [0, 0.4) and [0.4, 0.7)).