Revert "rm duplicate class name in ruby docs"

This reverts commit a5528e6932aea7f73804d26292552dd9e8e5fa30.
Revert "rm dupe class"

This reverts commit 5f4b5af2fed25fd731cddcdc762f940703c3c786.
module_function spec (pending)
remove a spec that apparently never could have passed (itype is never defined anywhere in the git history)