`@message` here doesn't get interpolated, should it call `super`?

e.g. if I break TFTP I see this:

    XXTFTP Settings for 1966test2.example.comX task failed with the following error: XERF12-5472: Unable to set TFTP boot entry for %s (RestClient::BadRequest - 400 Bad Request) for proxy http://localhost:8443/tftpXX

And I think the %s is coming from this message.