Haddock is a documentation-generation tool for Haskell
 libraries. These modules expose some functionality of it
 without pulling in the GHC dependency.
 .
 For interacting with Haddock itself, see the ‘haddock’ package.
 .
 This package provides the documentation for a library for the Haskell
 programming language.
 See http://www.haskell.org/ for more information on Haskell.