anchor.diff:                              after
                                   0 -> no_message
                               end,
  -                        ?ct_fail("expected message ~p but got \"~p\"", [??MsgPattern, ActualMessage])
  +                        ?ct_fail("expected message ~s but got \"~w\"", [??MsgPattern, ActualMessage])
                   end
           end()).
   -define(expect_message(MsgPattern), ?expect_message_timeout(MsgPattern, 1000)).
  
positive.code:         fun() ->
                  receive
                      ActualMessage ->
                          ?ct_fail("expected no message but got \"~p\"", [ActualMessage])
                  after
                      Timeout -> ok
                  end
  
negative.code:                     Any ->
                          ct:pal("Failed: Stacktrace ~p~n",
                                 [erlang:get_stacktrace()]),
                          ?ct_fail("~s evaluated to \"~w\" which is "
                                 "not the expected ~s~n"
                                 "(~w)",
                                 [??Actual, Any, ??ExpectedPattern, lists:flatten(Note)])
                  end
          end()).
  