libghc-zlib-doc binary package in Ubuntu Focal amd64

 This package provides a pure interface for compressing and decompressing
 streams of data represented as lazy ByteStrings. It uses the zlib C library so
 it has high performance. It supports the "zlib", "gzip" and "raw"
 compression formats.
 .
 It provides a convenient high level API suitable for most tasks and for the
 few cases where more control is needed it provides access to the full zlib
 feature set.
 .
 This package provides the documentation for a library for the Haskell
 programming language.
 See http://www.haskell.org/ for more information on Haskell.

Source package