Cool Haskell tools

Program coverage: https://wiki.haskell.org/Haskell_program_coverage Haskell playground: https://play-haskell.tomsmeding.com/play Ghcid - Recompile on changes: https://github.com/ndmitchell/ghcid Ormolu - No fuss formatting: https://hackage.haskell.org/package/ormolu