tests/test-revlog-ancestry.py.out

convert: make filemap prune useless branch closing revs (issue2774)

A branch closing revision only applies if one of its parents belongs to the
branch being closed. Otherwise the filemap can prune it too.

Ancestors of 5
4 2 0 
Ancestors of 6 and 5
3 4 2 1 0 
Ancestors of 5 and 4
4 2 0 

Descendants of 5
7 8 
Descendants of 5 and 3
6 7 8 
Descendants of 5 and 4
5 7 8