libghc-contravariant-extras-doc 0.3.5.3-1build4 (amd64 binary) in ubuntu lunar

 Extras for contravariant, including contrazip functions of multiple
 arities.
 .
 This package provides the documentation for a library for the Haskell
 programming language.
 See http://www.haskell.org/ for more information on Haskell.