A high 'scale' value distorts the rendering

[PatrickFromHolland]

used files:
page42.pdf (the example pdf-1 page only)

A full example with 1 html file and the pdf:
pdfjs.zip

Configuration:

• Firefox 81.0.2
• Windows 10:
• PDF.js version: 2.7.215
• Is a browser extension: no

Steps to reproduce the problem:

1. select scale-value 1.5 which renders fine (default).
2. select scale-value 5.0 (or higher)

What is the expected behavior? all output should render the same (i.e. like below)

What went wrong? The rendered output added extra border-width (or some padding?) that distorts the layout. When selecting an even higher scale all texts disappear behind this border.

[Snuffleupagus]

Fixed by PR #13361.