PDF files:
[1.pdf](https://github.com/mozilla/pdf.js/files/2955999/1.pdf)
[2.pdf](https://github.com/mozilla/pdf.js/files/2956000/2.pdf)
[3.pdf](https://github.com/mozilla/pdf.js/files/2956002/3.pdf)

Configuration:
- Web browser and its version: Chrome, Firefox
- Operating system and its version: Ubuntu, macOS
- PDF.js version: 2.2.42, but the same was with 2.1.x, and with https://mozilla.github.io/pdf.js/web/viewer.html
- Is a browser extension: no

Steps to reproduce the problem:
1. Select text
2. Copy text

What went wrong?

Getting this:
`OpenSansisahumanistsansseriftypefacedesignedbySteveMatteson.OpenSanswasdesignedwithanuprightstress,openformsandaneu-tral,yetfriendlyappearance.Itwasoptimizedforprint,web,andmobileinterfaces,andhasexcellentlegibilitycharacteristicsinitsletterforms(seefigureonthefollowingpage).ThisfontisavailablefromtheGoogleFontDirectory[]asTrueTypefileslicensedundertheApacheLicenseversion..`

Instead of this:
`Open Sans is a humanist sans serif typeface designed by Steve Matteson.
Open Sans was designed with an upright stress, open forms and a neutral,
yet friendly appearance. It was optimized for print, web, and mobile
interfaces, and has excellent legibility characteristics in its letterforms (see
figure 1 on the following page). This font is available from the Google Font
Directory [1] as TrueType files licensed under the Apache License version 2.0.`

This is quite significant problem, because I would say 1/20 of scientific papers encounter this problem.

cnt glyphStream = charPrc.get(key);
        cnt peratrLt = new OperatrLt();
        return type3Evaluatr
          .getOperatrLt({
            tream: glyphStream,
            tak,
            reurce: fntReurce,
            peratrLt,
          })
          .then(() => {
             Accrdng t the PDF pecfcatn, ectn "9.6.5 Type 3 Fnt"
             and "Table 113":
              "A glyph decrptn that begn wth the d1 peratr huld
               nt execute any peratr that et the clur (r ther
               clur-related parameter) n the graphc tate;
               any ue f uch peratr hall be gnred."
            f (peratrLt.fnArray[0] === OPS.etCharWdthAndBund) {
              th._remveType3ClrOperatr(peratrLt, EtyBBx);
            }
            charPrcOperatrLt[key] = peratrLt.getIR();
            fr (cnt dependency f peratrLt.dependence) {
              type3Dependence.add(dependency);
            }
          })
          .catch(functn (rean) {
            warn(`Type3 fnt reurce "${key}"  nt avalable.`);
            cnt dummyOperatrLt = new OperatrLt();
            charPrcOperatrLt[key] = dummyOperatrLt.getIR();
          });
      });