rem: << "'." << endl;
add: << "'." << std::endl;
context: int process_option(const string& option) {  if (option == "--help" ||      option == "--version") {    print_usage();    return(1);  }  switch(option[1])     {    case 'd':       {	int debuglevel = atoi(get_argument_number(1,option).c_str());	ecadebug->set_debug_level(debuglevel);	break;      }          case 'k':       {	ecaplay_skip_files = atoi(get_argument_number(1,option).c_str());	break;      }          case 'h':       {	print_usage();	return(1);      }          default:      {	std::cerr << "Error! Unknown option '" << option		  << "'." << endl;	return(2);      }    }  return(0);}