Demonstate issue with wonky constants on 1.9.2

I'm expecting this to fail, the reason why the spec is a new file is that 1.9.2's issue with wonky constants seems to stem from the first `instance_exec` not  the last, so having this inside an existing example group 
doesn't cause the bug to occur.

See #1697 

/cc @myronmarston
> Yeah that was the approach I took initially, but I also need to special case all of the inspect specs and/or special case inspect.

If it's simpler just to skip those specs on 1.9.2 I'm fine with that.