UniqOp -> UniqueOp

[Brian Goetz]

OK, but bear in mind the XxxOp classes are not going to be part of the 
public API.  These are strictly implementation-only.

On 11/15/2012 5:39 PM, Paul Benedict wrote:
> I would like to propose renaming UniqOp to UniqueOp. I do not see any
> benefit in leaving off the last 2 letters in the word. I also do not see
> any other class in the package oddly abbreviated.
>