Install libghc-hspec-core-doc by entering the following commands in the terminal:
sudo apt update sudo apt install libghc-hspec-core-doc
Description:
testing Framework for Haskell; documentation
This package exposes internal types and functions that can be used to extend Hspec's functionality. . 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://hspec.github.io/
Version: 2.4.4-1
Section: universe/doc