Install libghc-reducers-doc by entering the following commands in the terminal:
sudo apt update sudo apt install libghc-reducers-doc
Description:
semigroup-based containers and reductions; documentation
Semigroups, specialized containers and a general map/reduce framework. . 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/reducers/
Version: 3.12.2-1build2
Section: universe/doc