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.

for (let j = 0, jj = points.length; j < jj; j++) {
      const t = Util.applyTransform(points[j], m);
      ts[j + 0] = c && (e.left - t[0]) / c;
      ts[j + 4] = s && (e.top - t[1]) / s;
      ts[j + 8] = c && (e.right - t[0]) / c;
      ts[j + 12] = s && (e.bottom - t[1]) / s;
      ts[j + 16] = s && (e.left - t[0]) / -s;
      ts[j + 20] = c && (e.top - t[1]) / c;
      ts[j + 24] = s && (e.right - t[0]) / -s;
      ts[j + 28] = c && (e.bottom - t[1]) / c;
      ts[j + 32] = c && (e.left - t[0]) / -c;
      ts[j + 36] = s && (e.top - t[1]) / -s;
      ts[j + 40] = c && (e.right - t[0]) / -c;
      ts[j + 44] = s && (e.bottom - t[1]) / -s;
      ts[j + 48] = s && (e.left - t[0]) / s;
      ts[j + 52] = c && (e.top - t[1]) / -c;
      ts[j + 56] = s && (e.right - t[0]) / s;
      ts[j + 60] = c && (e.bottom - t[1]) / -c;
    }
    
    
    const boxScale = 1 + Math.min(Math.abs(c), Math.abs(s));
    divProperties.paddingLeft = findPositiveMin(ts, 32, 16) / boxScale;
    divProperties.paddingTop = findPositiveMin(ts, 48, 16) / boxScale;
    divProperties.paddingRight = findPositiveMin(ts, 0, 16) / boxScale;
    divProperties.paddingBottom = findPositiveMin(ts, 16, 16) / boxScale;
    task._textDivProperties.set(div, divProperties);
  }
}
function expandBounds(width, height, boxes) {