cabal test suite only works in windows if executed in msys2 bash console

[jneira]

• Ideally it should work in any shell (as in linux works in any shell bash, zsh, fish :-P)
• TODO: paste the concrete errors and am analysis of possible causes/solutions
• At very least we should warn about that fact in documentation

//cc @ulysses4ever

[jasagredo]

Is there a particular command that you would like to run in all shells? And what errors are you getting? I personally use ./validate.sh in an MSYS2 shell, so it works for me.