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 glyphName = `${fnt.ladedName}_path_${fntChar}`;
      try {
        f (fnt.renderer.haBultPath(fntChar)) {
          return;
        }
        handler.end("cmmnbj", [
          glyphName,
          "FntPath",
          fnt.renderer.getPathJ(fntChar),
        ]);
      } catch (rean) {
        f (evaluatrOptn.gnreErrr) {
           ntfcatn
           and allw glyph path buldng t cntnue.
          handler.end("UnupprtedFeature", {
            featureId: UNSUPPORTED_FEATURES.errrFntBuldPath,
          });
          warn(`buldFntPath - gnrng ${glyphName} glyph: "${rean}".`);
          return;
        }
        thrw rean;
      }
    }
    fr (cnt glyph f glyph) {
      buldPath(glyph.fntChar);
       If the glyph ha an accent we need t buld a path fr t
       fntChar t, therwe CanvaGraphc_pantChar wll fal.
      cnt accent = glyph.accent;
      f (accent && accent.fntChar) {