Isn't it?

Challenge [Escape Sequences in Strings](https://freecodecamp.cn/challenges/escape-sequences-in-strings#?solution=var%20myStr%20%3D%20%22%5C%5C%20%5Ct%20%5Cb%20%5Cr%20%5Cf%22%3B%20%2F%2F%20%E8%AF%B7%E4%BF%AE%E6%94%B9%E8%BF%99%E4%B8%80%E8%A1%8C%0A%0A%0A) has an issue.
User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.99 Safari/537.36.
Please describe how to reproduce this issue, and include links to screenshots if possible.

My code:
```javascript
var myStr = "\\ \t \b \r \f"; // 请修改这一行

```