Attach (recommended) or Link to PDF file here:
[test.pdf](https://github.com/mozilla/pdf.js/files/6715502/test.pdf)

Configuration:
- Web browser and its version: Google Chrome Version 91.0.4472.114 
- Operating system and its version: Windows 10 Enterprise
- PDF.js version: 
- Is a browser extension: yes

Steps to reproduce the problem:
1. download file
2. open file



What is the expected behavior? (add screenshot)
show symbol
![image](https://user-images.githubusercontent.com/50500976/123409847-55ca8800-d5b7-11eb-9e5b-c7f3b33c00e1.png)

What went wrong? (add screenshot)
Does not show symbol
![image](https://user-images.githubusercontent.com/50500976/123409707-274cad00-d5b7-11eb-9a64-b11dcf3cdc3f.png)
Link to a viewer (if hosted on a site other than mozilla.github.io/pdf.js or as Firefox/Chrome extension): Latest Version Chrome extension

const possibleSpaceReplacements = ["space", "minus", "one", "i", "I"];
    let width;
    for (let i = 0, ii = possibleSpaceReplacements.length; i < ii; i++) {
      const glyphName = possibleSpaceReplacements[i];
      
      if (glyphName in this.widths) {
        width = this.widths[glyphName];
        break;
      }
      const glyphsUnicodeMap = getGlyphsUnicode();
      const glyphUnicode = glyphsUnicodeMap[glyphName];
      
      let charcode = 0;
      if (this.composite && this.cMap.contains(glyphUnicode)) {
        charcode = this.cMap.lookup(glyphUnicode);
      }
      
      if (!charcode && this.toUnicode) {
        charcode = this.toUnicode.charCodeOf(glyphUnicode);
      }
      
      if (charcode <= 0) {
        charcode = glyphUnicode;
      }
      
      width = this.widths[charcode];
      if (width) {
        break; 
      }