anchor.diff:  %%                                 0 ->
   %%                                     unknown
   %%                             end,
  -%%             ?ct_fail("expected message ~w but got ~w", [MsgPattern, ActualMessage])
  +%%             ?ct_fail("expected message ~.0p but got ~.0p", [MsgPattern, ActualMessage])
   %%     end.
  
positive.code:                                     after
                                          0 -> no_message
                                      end,
                                  ?ct_fail("expected message ~s but got \"~w\"~n", [??MsgPattern, ActualMessage])
                          end
                      MsgPattern -> ok
                  after
  
negative.code:                     Any ->
                          ct:pal("Failed: Stacktrace ~p~n",
                                 [util:get_stacktrace()]),
                          ?ct_fail("~s evaluated to \"~.0p\" which is "
                                 "not the expected ~s that evaluates to \"~.0p\"~n",
                                 [??Actual, Any, ??Expected, ExpectedVal])
                  end
          end()).
  