Attach (recommended) or Link to PDF file here:
https://www.nta.go.jp/taxes/tetsuzuki/shinsei/annai/joyaku/annai/pdf2/250.pdf

Configuration:
- Web browser and its version: Firefox 81.0a1
- Operating system and its version: Debian 5.6.7-1
- PDF.js version: latest in Firefox nightly
- Is a browser extension: No

Steps to reproduce the problem:
1. Open the pdf and paste the following text "本 店 又 は 主 た る 事 務 所 の 所 在 地" in "Full name" and in "Domicile and residence" textfields
2. Print or Save the pdf 

What is the expected behavior? (add screenshot)
![image](https://user-images.githubusercontent.com/5641725/91207547-30f05480-e709-11ea-9abd-2af5d970dc46.png)

What went wrong? (add screenshot)
![image](https://user-images.githubusercontent.com/5641725/91207663-69902e00-e709-11ea-8a1d-1ddd30cf0621.png)

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

idFactoryMock
      ).then(({ data }) => {
        ta.url).toEqual("https://developer.mozilla.org/en-US/");
        done();
      }, done.fail);
    });
  });
  describe("ChoiceWidgetAnnotation", function () {
    let choiceWidgetDict, fontRefObj;
    beforeEach(function (done) {
      choiceWidgetDict = new Dict();
      choiceWidgetDict.set("Type", Name.get("Annot"));
      choiceWidgetDict.set("Subtype", Name.get("Widget"));
      choiceWidgetDict.set("FT", Name.get("Ch"));
      const helvDict = new Dict();
      helvDict.set("BaseFont", Name.get("Helvetica"));
      helvDict.set("Type", Name.get("Font"));
      helvDict.set("Subtype", Name.get("Type1"));
      const fontRef = Ref.get(314, 0);
      fontRefObj = { ref: fontRef, data: helvDict };
      const resourceDict = new Dict();
      const fontDict = new Dict();
      fontDict.set("Helv", fontRef);
      resourceDict.set("Font", fontDict);
      choiceWidgetDict.set("DA", "/Helv 5 Tf");
      choiceWidgetDict.set("DR", resourceDict);
      choiceWidgetDict.set("Rect", [0, 0, 32, 10]);
      done();
    });
    afterEach(function () {