anchor.diff:  
   %% @private
   gossip_messages(State0, State) ->
  -    MembershipList = without_me(membership_list(State0)),
  -
       case partisan_config:get(gossip, true) of
           true ->
  -            case MembershipList of
  +            case without_me(membership_list(State0)) of
                   [] ->
                       [];
                   AllPeers ->
  
positive.code:         undefined ->
              undefined
      end.
  
  %% @private
  new_state(Actor) ->
  
negative.code:             {ok, MembershipList, OutgoingMessages, State0};
          false ->
              %% Merge, persist, reforward to peers.
              M = partisan_membership_set:merge(M0, M1),
              State = State0#full_v1{membership = M},
              MembershipList = membership_list(State),
              OutgoingMessages = gossip_messages(State),
              persist_state(State),
  