Install libghc-trifecta-doc by entering the following commands in the terminal:
sudo apt update sudo apt install libghc-trifecta-doc
Description:
modern parser combinator library with convenient diagnostics; documentation
A modern parser combinator library with slicing and Clang-style colored diagnostics. . 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/trifecta/
Version: 1.6.2.1-1build8
Section: universe/doc