[racket-dev] Determining if a resolved module path is a real module name

Sometimes, `resolved-module-path-name` produces the symbol '|expanded
module|. Is this the only symbol that's produced that _isn't_ the
actual name of a module?

Also, given that I'm calling `expand` on a module form, is it possible
to do something so that I _don't_ end up with '|expanded module| as
the name?

Sam