exception with message does not show the right sourcecode

[gedaiu]

 should throw a `CrateNotFoundException` with message equal ``. `The user does not exist.` is not equal to ``.
Diff:The user does not exist.


   Actual:The user does not exist.

../../.dub/packages/fluent-asserts-0.11.4/fluent-asserts/source/fluentasserts/core/base.d:417
   411:
   412:
   413:  auto withMessage(string expectedMessage) {
   414:    auto s = ShouldString(msg);
   415:    check = false;
   416:
>  417:    return s.forceMessage(messages ~ Message(false, " with message")).equal(expectedMessage);
   418:  }