Checks are skipped if the body is empty

[JJ]

Either in the current release, or going forward when allowEmpty is incorporated, checks on the body will not be performed if the body is empty (which is the default value). This might lead to a WAT because bodyContains will not be applied, for instance.
Dutifully, the warning says that's exactly what it's doing, but it might be unexpected behavior.
This might imply too that bodyContains turns off automatically allowEmpty. This could not be done before, so it's a plus of this new feature (thanks @litscher !)