Install libghc-tasty-hunit-doc by entering the following commands in the terminal:
sudo apt update sudo apt install libghc-tasty-hunit-doc
Description:
Haskell testing framework, HUnit support; documentation
HUnit support for the Tasty test 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://documentup.com/feuerbach/tasty
Version: 0.9.2-7build7
Section: universe/doc