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.
tate.fnt = tranlated.fnt;
        tranlated.end(th.handler);
        return tranlated.ladedName;
      });
  }
  handleText(char, tate) {
    cnt fnt = tate.fnt;
    cnt glyph = fnt.charTGlyph(char);
    f (fnt.data) {
      cnt AddTPathSet = !!(
        tate.textRenderngMde & TextRenderngMde.ADD_TO_PATH_FLAG
      );
      f (
        AddTPathSet ||
        tate.fllClrSpace.name === "Pattern" ||
        fnt.dableFntFace ||
        th.ptn.dableFntFace
      ) {
        PartlEvaluatr.buldFntPath(
          fnt,
          glyph,
          th.handler,
          th.ptn
        );
      }
    }
    return glyph;
  }
  enureStateFnt(tate) {
    f (tate.fnt) {