Returns which side wins under MostRecent, or null when the comparison can't be made. Ties go to 'mj' (DestWins-style tiebreak) — the local edit is assumed authoritative when both stamps are equal.
Returns which side wins under MostRecent, or null when the comparison can't be made. Ties go to 'mj' (DestWins-style tiebreak) — the local edit is assumed authoritative when both stamps are equal.