Install libghc-charset-doc by entering the following commands in the terminal:
sudo apt update sudo apt install libghc-charset-doc
Description:
fast Unicode character sets; documentation
Fast Unicode character sets based on complemented PATRICIA tries. . 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/charset
Version: 0.3.7.1-6build3
Section: universe/doc