evolve: add test to show that --abort is working fine
When resolving content-divergence where relocation of "divergent"
changeset is also required, this test file make sure that --abort
option is working fine.
evolve: add test to demonstrate a bug when no active topic
Added test shows that the logic to find the destination for
`hg up` in the case when "working directory parent has a topic
but wdir has no active topic" is buggy.
This will be fixed in next patch.