Comment 1 for bug 413970

Gary's change http://bazaar.launchpad.net/~garyvdm/bzr/find_branches_generator/revision/4604 seems to be changing the existing method to be an iterator rather than to return a list. That's strictly speaking an API break and should be at least mentioned in NEWS. I would probably let it merge though. I don't think there would be many existing callers that really need a list and it's easy enough to cast it if you do.

Therefore we'd just need to check there are already tests for this - probably in per_repository.