anchor.diff:                             receive
                                  {'DOWN', _, process, Pid, Reason} ->
                                      ee("Unexpected DOWN regarding handler 2 ~p: "
  -                                      "~n   ~p", [Reason]),
  +                                      "~n   ~p", [Pid, Reason]),
                                      {error, {unexpected_exit, handler2}};
                                  {ready, Pid} ->
                                      ok
  
positive.code:                            receive
                                 {'DOWN', _, process, Tester, Reason} ->
                                     ee("Unexpected DOWN regarding tester ~p: "
                                        "~n   ~p", [Reason]),
                                     {error, {unexpected_exit, tester}};
                                 {terminate, Tester} ->
                                     {ok, maps:remove(tester, State)}
  
negative.code:                            receive
                                 {'DOWN', _, process, Pid, Reason} ->
                                     ee("Unexpected DOWN regarding sec-acceptor 1 ~p:"
                                        "~n   ~p", [Pid, Reason]),
                                     {error, {unexpected_exit, sec_acceptor_1}};
                                 {ready, Pid} ->
                                     ok
  