twill-sh --version (return code: 0)
twill version 0.9.
twill-sh --help (return code: 0)
Usage: twill-sh [options]
Options:
-h, --help show this help message and exit
-q, --quiet do not show normal output
-i, --interactive drop into an interactive shell after running files (if
any)
-f, --fail fail exit on first file to fail
-n, --never-fail continue executing scripts past errors
-v, --version show version information and exit
-u URL, --url=URL start at the given URL before each script