"    Input:  {
                cmd                 - shell command with parameters to run
            }

    Output: {
                output_lines        - an array of lines of the command's output

                return              - return code =  0, if successful
                                                  >  0, if error
                (error)             - error text if return > 0
            }
    Tests:
        ck capture_command_output misc --cmd='ls -1'
"