Module instantiation errors are not located

[boyland]

In 1.6.0a1, if someone has an error in a module instantiation, for example, passing in a rule, the entire instantiation is underlined and the error message can be unspecified, e.g.

A module argument must be a syntax, judgment, rule, or theorem, but an undefined identifier was provided.

It neither underlines the argument (it underlines the entire module instantiation), nor does the message give the undefined identifier.

This appears to the case for most (all?) other module instantiation errors: the entire instantiation is underlined rather than the offending part.