def help_now!(message=nil)
      exception = OptionParser::ParseError.new(message)
      class << exception
        def exit_code; 64; end
      end
      raise exception
    end
def help_now!(message=nil)
      exception = OptionParser::ParseError.new(message)
      class << exception
        def exit_code; 64; end
      end
      raise exception
    end
Exit now, showing the user help for the command they executed.  Use #exit_now! to just show the error message

 message:: message to indicate how the user has messed up the CLI invocation or nil to just simply show help