Either me no english or there's a slight logical error in the Docs for Diffusion at https://secure.phabricator.com/source/phabricator/browse/master/src/docs/user/userguide/diffusion_existing.diviner$51
It says "... push all of your changes to empty the repository." which means I have an empty Repo and push some changes into it to make it even emptier, possibly creating a black hole and destroying the Universe while doing so ???
I think "empty" & "the" need to be switched, seems to make way more sense to me.