ppCombinationalEntry :: CombinationalEntry -> Doc
ppCombinationalEntry (CombinationalEntry inputs output)
  = hsep (map ppLevelSymbol inputs) <+> colon <+> ppOutputSymbol output <> semi
ppCombinationalEntry :: CombinationalEntry -> Doc
ppCombinationalEntry (CombinationalEntry inputs output)
  = hsep (map ppLevelSymbol inputs) <+> colon <+> ppOutputSymbol output <> semi
ppCombinationalEntry (CombinationalEntry inputs output)
  = hsep (map ppLevelSymbol inputs) <+> colon <+> ppOutputSymbol output <> semi