Add test to see which version of bash 'prove' uses
Add test to see which version of bash 'prove' uses

The version is output as a diagnostic message so use prove's '-v'
option. To see what version of bash is in the PATH, run:

    prove -fv ./t/bash_version.sh

To see the version of another bash, use prove's '--exec' option to
specify the path to that bash:

    prove -fv -e /bin/bash ./t/bash_version.sh

jazzhead/shmark