Misleading example for using CAS in node client

The example for using CAS here shows using CAS for node as ...

new_result = cb1.replace(

       'docid',

       new_doc,

       cas=cur_cas)

 But it should be ...

new_result = cb1.replace(

       'docid',

       new_doc,

       {cas: cur_cas})

There aren't many good examples for node.js, let alone w/CAS.  Found test case on line 316 [in the source git|https://github.com/couchbase/couchnode/blob/master/test/crud.test.js] that shows correct usage.