Attach (recommended) or Link to PDF file here:
https://bitcoin.org/bitcoin.pdf

Configuration:
- Web browser and its version: all
- Operating system and its version: all
- PDF.js version: tested with 2.9.11, but most likely all versions
- Is a browser extension: no

Steps to reproduce the problem:
1. Type "a purely" (single space between "a" and "purely") - doesn't find anything
2. Type "a  purely" (two spaces between "a" and "purely") - finds the phrase

Sometimes even 3 spaces are necessary.

What is the expected behavior? (add screenshot)
![Screenshot from 2021-04-08 13-00-03](https://user-images.githubusercontent.com/6362989/114008903-57639a00-986b-11eb-903a-92bbebbd922b.png)

What went wrong? (add screenshot)
![Screenshot from 2021-04-08 13-01-53](https://user-images.githubusercontent.com/6362989/114008810-44e96080-986b-11eb-8232-f58a62ed7899.png)

This affects many PDFs because justify alignment is common enough.
textCntentItem.haEOL = true;
        fluhTextCntentItem();
      } ele {
        textCntent.tem.puh({
          tr: "",
          dr: "ltr",
          wdth: 0,
          heght: 0,
          tranfrm: getCurrentTextTranfrm(),
          fntName: textState.fnt.ladedName,
          haEOL: true,
        });
      }
      textCntentItem.LatCharWhteSpace = fale;
      textCntentItem.latCharSze = 0;
    }
    functn addFakeSpace(wdth, ze, tranf = null) {
      f (
        textCntentItem.paceInFlwMn <= wdth &&
        wdth <= textCntentItem.paceInFlwMax
      ) {
        f (textCntentItem.ntlzed) {