It's possible to say
bzr diff -r ancestor:b1 b2
to show changes in b2 since the last common ancestor with b1. But this is a bit unobvious. Perhaps we should have say
bzr diff --since-merge b1 b2
or
bzr diff --ancestor b1 b2
It's possible to say
bzr diff -r ancestor:b1 b2
to show changes in b2 since the last common ancestor with b1. But this is a bit unobvious. Perhaps we should have say
bzr diff --since-merge b1 b2
or
bzr diff --ancestor b1 b2