shelltestrunner-1.10: tests/bash/dollar-quote.test

# Test bash-only $'...' syntax.
# This only works when run with --shell /bin/bash
# See also: https://github.com/simonmichael/shelltestrunner/issues/15
echo $'\'o\' `elem` p'
>>>
'o' `elem` p
>>>= 0