QuickCheck common typeclasses; documentation

 This library provides QuickCheck properties to ensure
 that typeclass instances adhere to the set of laws that
 they are supposed to. There are other libraries that do
 similar things, such as `genvalidity-hspec` and `checkers`.
 This library differs from other solutions by not introducing
 any new typeclasses that the user needs to learn.
 .
 This package provides the documentation for a library for the Haskell
 programming language.
 See http://www.haskell.org/ for more information on Haskell.