libghc-pretty-show-dev 1.6.15-1 (amd64 binary) in ubuntu bionic

 A library that can parse derived Show instances into a generic data structure
 which can then be pretty printed. For complex data structures, the pretty
 printed version is significantly more readable that the standard Show output.
 .
 This package provides a library for the Haskell programming language.
 See http://www.haskell.org/ for more information on Haskell.