isSymOcc (OccName DataName s) = isLexConSym s
isSymOcc (OccName TcClsName s) = isLexConSym s
isSymOcc (OccName VarName s) = isLexSym s
-isSymOcc other = False
+isSymOcc (OccName TvName s) = isLexSym s
parenSymOcc :: OccName -> SDoc -> SDoc
-- Wrap parens around an operator