Attach (recommended) or Link to PDF file here:
[test2-3.pdf](https://github.com/mozilla/pdf.js/files/7881930/test2-3.pdf)

Configuration:
- Web browser and its version: Chrome and Version 93.0.4577.63
- Operating system and its version: Ubuntu 20.04.1 LTS
- PDF.js version: v2.12.313
- Is a browser extension: No

What is the expected behavior? 
![Screenshot from 2022-01-17 18-21-02](https://user-images.githubusercontent.com/29357161/149772453-5906d92a-7cf5-458f-8315-695d78aa9674.png)


What went wrong? 
![Screenshot from 2022-01-17 18-20-24](https://user-images.githubusercontent.com/29357161/149772465-07dd71ef-5d41-42c9-8b13-466f8eee116a.png)


Link to a viewer (if hosted on a site other than mozilla.github.io/pdf.js or as Firefox/Chrome extension):
https://mozilla.github.io/pdf.js/web/viewer.html

let comment = false;
      let ch = this.currentChar;
      while (true) {
        if (ch === -1) {
          return null;
        }
        if (comment) {
          if (ch === 0x0a || ch === 0x0d) {
            comment = false;
          }
        } else if (ch ===  0x25) {
          comment = true;
        } else if (!isWhiteSpace(ch)) {
          break;
        }
        ch = this.nextChar();
      }
      if (isSpecial(ch)) {
        this.nextChar();
        return String.fromCharCode(ch);
      }
      let token = "";
      do {
        token += String.fromCharCode(ch);
        ch = this.nextChar();
      } while (ch >= 0 && !isWhiteSpace(ch) && !isSpecial(ch));
      return token;
    }
    readCharStrings(bytes, lenIV) {