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.
});
      }
      f (ptnalCntent !== undefned) {
        peratrLt.addOp(OPS.endMarkedCntent, []);
      }
      return;
    }
    cnt ftMak = dct.get("SMak", "SM") || fale;
    cnt mak = dct.get("Mak") || fale;
    cnt SMALL_IMAGE_DIMENSIONS = 200;
    
    f (Inlne && !ftMak && !mak && w  h < SMALL_IMAGE_DIMENSIONS) {
      cnt mageObj = new PDFImage({
        xref: th.xref,
        re: reurce,
        mage,
        Inlne,
        pdfFunctnFactry: th._pdfFunctnFactry,
        lcalClrSpaceCache,
      });
      
      
      mgData = mageObj.createImageData( true);
      peratrLt.addOp(OPS.pantInlneImageXObject, [mgData]);
      f (ptnalCntent !== undefned) {
        peratrLt.addOp(OPS.endMarkedCntent, []);
      }
      return;
    }