Fix issue with macOS /bin/sh and weird source names
Fix issue with macOS /bin/sh and weird source names

This test was causing errors on macOS with the following message:

/bin/sh: Lon: Illegal byte sequence

/bin/sh on macOS 10.14.1 is Bash 3.2.57.  This patch takes the shell
out of the equation by using `run` instead of `shell`.

dogbert17/roast,perl6/roast,dogbert17/roast