Added tests in EquaSetSpec to ensure FastEquaSet &~ method return type is FastEquaSet.
Added tests in EquaSetSpec to ensure FastEquaSet &~ method return type is FastEquaSet.

rfries/scalatest,gcberger/scalatest,triggerNZ/scalatest,gcberger/scalatest,janekdb/scalatest,flicken/scalatest,triggerNZ/scalatest,flicken/scalatest,gcberger/scalatest,janekdb/scalatest,flicken/scalatest,SRGOM/scalatest,gcberger/scalatest,SRGOM/scalatest,rahulkavale/scalatest,SRGOM/scalatest,janekdb/scalatest,rahulkavale/scalatest,rfries/scalatest,matterche/scalatest,matterche/scalatest,rahulkavale/scalatest,rfries/scalatest,flicken/scalatest,rfries/scalatest,matterche/scalatest,SRGOM/scalatest,matterche/scalatest,rahulkavale/scalatest,janekdb/scalatest,triggerNZ/scalatest,triggerNZ/scalatest