evolve: point to `hg help evolve.interrupted` while resolving content-div
Recent test additions shows that --abort and --stop works well while resolving
content-divergence and we should advertise them. This patch does so by pointing
to evolve.interrupted help topic.
tests: add test about aborting content-divergence when multiple parents
This patch adds tests for --abort flag of hg evolve command when we are
resolving content-divergence which are on different parents and parent of one of
them is the gca of both of them.
The tests shows that we are doing good and we should advertise the flag during
conflicts.