console.log(RegExp("\\\nfo\n[\n]o\\bbb"));
console.log(RegExp("\n"));
console.log(RegExp("\\n"));
console.log(RegExp("\\\n"));
console.log(RegExp("\\\\n"));
console.log(RegExp("\\\\\n"));
console.log(RegExp("\\\\\\n"));
console.log(RegExp("\\\\\\\n"));
console.log(RegExp("\r"));
console.log(RegExp("\u2028"));
console.log(RegExp("\u2029"));
console.log(RegExp("\n\r\u2028\u2029"));