revset: use `subset &` in `ancestorspec`...
revset: use `subset &` in `ancestorspec`
This takes advantage of the `fullreposet` smartness.
revset
#0: tip~25
0) wall 0.004800 comb 0.010000 user 0.010000 sys 0.000000 (best of 259)
1) wall 0.002475 comb 0.000000 user 0.000000 sys 0.000000 (best of 717)