Error message not correct about butter

[benknoble]

Looks like method assign in environment.go: perhaps we should just verify that value.(type) and found.(type) are the same.

At any rate, the error message seems backwards. I would have expected "Cannot assign int to string type" or something like that.

[abrahampost]

Yep, that makes sense. I will try to submit a fix later tonight!

The reason the logic is a little squirrely currently is that I haven't quite gotten the hang of Go's type system yet. You can only use <variable>.(type) in a switch statement, so I was struggling with type checking in a few places. I think I will try to use one of the techniques outlined in this stack overflow post in order to simplify the logic a bit.

Thanks a bunch for finding that error!!!

[abrahampost]

closed in #7