docopt.rb/examples/any_options_example.rb
Running test.rb with an option and a valid <port> should not fail.
> test.rb -q 123
Usage:
exe/test.rb [options] <port>
Options:
-h --help show this help message and exit
--version show version and exit
-n, --number N use N as a number
-t, --timeout TIMEOUT set timeout TIMEOUT seconds
--apply apply changes to database
-q operate in quiet mode