function requireHasFlag () {
	if (hasRequiredHasFlag) return hasFlag;
	hasRequiredHasFlag = 1;

	hasFlag = (flag, argv = process.argv) => {
		const prefix = flag.startsWith('-') ? '' : (flag.length === 1 ? '-' : '--');
		const position = argv.indexOf(prefix + flag);
		const terminatorPosition = argv.indexOf('--');
		return position !== -1 && (terminatorPosition === -1 || position < terminatorPosition);
	};
	return hasFlag;
}
Map %j to `JSON.stringify()`, since no Web Inspectors do that by default.