Fix convert lhs -> ipynb v4 json.
Fix convert lhs -> ipynb v4 json.

artuuge/IHaskell,beni55/IHaskell,franklx/IHaskell,qzchenwl/IHaskell,kfiz/IHaskell,qzchenwl/IHaskell,qzchenwl/IHaskell,thomasjm/IHaskell,gibiansky/IHaskell,gibiansky/IHaskell,artuuge/IHaskell,sumitsahrawat/IHaskell,kfiz/IHaskell,FranklinChen/IHaskell,sumitsahrawat/IHaskell,beni55/IHaskell,sumitsahrawat/IHaskell,artuuge/IHaskell,kfiz/IHaskell,franklx/IHaskell,thomasjm/IHaskell,wyager/IHaskell,franklx/IHaskell,qzchenwl/IHaskell,franklx/IHaskell,artuuge/IHaskell,kfiz/IHaskell,wyager/IHaskell,wyager/IHaskell,FranklinChen/IHaskell,gibiansky/IHaskell,FranklinChen/IHaskell,thomasjm/IHaskell,wyager/IHaskell,thomasjm/IHaskell,beni55/IHaskell,FranklinChen/IHaskell,beni55/IHaskell