Install libghc-fingertree-doc by entering the following commands in the terminal:
sudo apt update sudo apt install libghc-fingertree-doc
Description:
Generic finger-tree data structure implementation in Haskell; documentation
This Haskell library provides a general sequence representation with arbitrary annotations, for use as a base for implementations of various collection types. . This package contains the documentation files.
Homepage: http://hackage.haskell.org/package/fingertree
Version: 0.1.3.1-1
Section: universe/doc