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.
peratrLt,
    cacheKey,
    tak,
    tateManager,
    lcalGStateCache,
    lcalClrSpaceCache,
  }) {
    cnt gStateRef = gState.bjId;
    let SleGState = true;
    
    cnt gStateObj = [];
    cnt gStateKey = gState.getKey();
    let prme = Prme.relve();
    fr (let  = 0,  = gStateKey.length;  < ; ) {
      cnt key = gStateKey[];
      cnt value = gState.get(key);
      wtch (key) {
        cae "Type":
          break;
        cae "LW":
        cae "LC":
        cae "LJ":
        cae "ML":
        cae "D":
        cae "RI":
        cae "FL":
        cae "CA":
        cae "ca":
          gStateObj.puh([key, value]);
          break;