Added unit specs on Double#returns when passed an argument or block that returns a DoubleDefinition or a DoubleDefinitionCreatorProxy.
Added unit specs on Double#returns when passed an argument or block that returns a DoubleDefinition or a DoubleDefinitionCreatorProxy.


git-svn-id: 1e6f00f2bd005a56b2b0531319ef91ef3657b489@1872 af276e61-6b34-4dac-905b-574b5f35ef33

rr/rr,btakita/rr,rr/rr