bring in line with rakudo's run()/shell() changes
bring in line with rakudo's run()/shell() changes

This should still work on niecza and pugs.

skids/roast,b2gills/roast,skids/roast,laben/roast,niner/roast,b2gills/roast,niner/roast,zostay/roast,b2gills/roast,dankogai/roast,niner/roast,zostay/roast,perl6/roast,dankogai/roast,dankogai/roast,bitrauser/roast,bitrauser/roast,zostay/roast,cygx/roast,skids/roast,laben/roast,cygx/roast,dogbert17/roast,laben/roast,dogbert17/roast,cygx/roast