I changed the indefinite article in the system message for nothing_to_get from "a" to "any" so that it gives a sensible response for both a singular object and plural objects.
nothing_to_get = You look around but can't see any ${noun} anywhere.
However, I've just noticed that ${noun} in the same message gives the wrong response when you use "it". For example:
>EXAMINE MOON
You see nothing special.
>GET MOON
You look around but can't see any moon anywhere.
>GET IT
You look around but can't see any it anywhere.