default instances for types in base; documentation

 This module defines Default instances for the types Int, Int8, Int16,
 Int32, Int64, Word, Word8, Word16, Word32, Word64, Integer, Float,
 Double, Ratio, Complex, '(->)', IO, Maybe, '()', '[]', Ordering, Any,
 All, Last, First, Sum, Product, Endo, Dual, and tuples.
 .
 This package provides the documentation for a library for the Haskell
 programming language.
 See http://www.haskell.org/ for more information on Haskell.