Admin/haskell/stack/README

treat map_filter similar to list_all, list_ex, list_ex1

This is stack 2.5.1 -- the Haskell Tool Stack.

See also https://www.haskellstack.org and executables from
https://github.com/commercialhaskell/stack/releases/tag/v2.7.3 as follows:

  * x86_64-linux: stack-2.7.3-linux-x86_64.tar.gz
  * x86_64-darwin: stack-2.7.3-osx-x86_64.tar.gz
  * x86_64-windows: stack-2.7.3-windows-x86_64.tar.gz


    Makarius
    25-Jul-2021