jschoubben
71b3aeaf2c
A merge's group member counted as merged when its merge waited in any batch, but kinds never share a batch: the later member got a batch of its own, cut at once, and walked before the earlier member's batch was cut, breaking the group's order (ADR 0276 §5). Only a member kept in a batch of the merge's own kind counts as merged now; one kept in the other kind's keeps the merge waiting, and its batch names that member, so the two are cut in the order their windows close (review of #250).