Streamline core module install script
Streamline core module install script

- use fewer dynamic variable lookups
- change mention of $*PERL to $*RAKU

rakudo/rakudo,rakudo/rakudo,MasterDuke17/rakudo,MasterDuke17/rakudo,MasterDuke17/rakudo,nbrown/rakudo,tony-o/rakudo,rakudo/rakudo,tbrowder/rakudo,labster/rakudo,softmoth/rakudo,tbrowder/rakudo,rakudo/rakudo,nbrown/rakudo,salortiz/rakudo,tony-o/rakudo,rakudo/rakudo,softmoth/rakudo,softmoth/rakudo,MasterDuke17/rakudo,salortiz/rakudo,tbrowder/rakudo,tbrowder/rakudo,nbrown/rakudo,nbrown/rakudo,tbrowder/rakudo,salortiz/rakudo,tony-o/rakudo,softmoth/rakudo,nbrown/rakudo,labster/rakudo,nbrown/rakudo,labster/rakudo,labster/rakudo,tony-o/rakudo,rakudo/rakudo,tbrowder/rakudo,MasterDuke17/rakudo,labster/rakudo,salortiz/rakudo,tony-o/rakudo,tony-o/rakudo,salortiz/rakudo,salortiz/rakudo,softmoth/rakudo,labster/rakudo,MasterDuke17/rakudo