-------------------
a_RDR, b_RDR :: RdrName
-a_RDR = mkVarUnqual FSLIT("a")
-b_RDR = mkVarUnqual FSLIT("b")
+a_RDR = mkVarUnqual (fsLit "a")
+b_RDR = mkVarUnqual (fsLit "b")
gs_RDR :: [RdrName]
gs_RDR = [ mkVarUnqual (mkFastString ("g"++show i)) | i <- [(1::Int) .. ] ]