Previously when wishing for "ring of protection from shape shifters",
you got a random ring instead of the protection from shape changers,
because the string matching alias was "protection from shape shifters"
without the object class. Now, we'll check if the wish matched any
object class, but not existing object or alias, and try matching
the aliases again, but only those of the already matching obj class.
Add an alias for the ring of increase accuracy: "ring of accuracy",
and tests for it.
