Install libghc-bifunctors-doc by entering the following commands in the terminal:
sudo apt update sudo apt install libghc-bifunctors-doc
Description:
Haskell 98 bifunctors; documentation
A binary functor is a functor in two arguments. This package provides bifoldables and bitraversables. . This package provides the documentation for a library for the Haskell programming language. See http://www.haskell.org/ for more information on Haskell.
Homepage: http://github.com/ekmett/bifunctors/
Version: 5.4.2-1build3
Section: universe/doc