Install libghc-mono-traversable-doc by entering the following commands in the terminal:
sudo apt update sudo apt install libghc-mono-traversable-doc
Description:
typeclasses for mapping/folding/traversing monomorphic containers; documentation
Monomorphic variants of the Functor, Foldable, and Traversable typeclasses. Contains even more experimental code for abstracting containers and sequences. . This package provides the documentation for a library for the Haskell programming language. See http://www.haskell.org/ for more information on Haskell.
Homepage: https://github.com/snoyberg/mono-traversable
Version: 1.0.6.0-1
Section: universe/doc