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.
});
    it(
      "should fetch document info and page, without range, " +
        "using complete initialData",
      async function () {
        let fetches = 0;
        const data = await dataPromise;
        const transport = new PDFDataRangeTransport(
          data.length,
          data,
           true
        );
        transport.requestDataRange = function (begin, end) {
          fetches++;
        };
        const loadingTask = getDocument({
          disableRange: true,
          range: transport,
        });
        const pdfDocument = await loadingTask.promise;
        expect(pdfDocument.numPages).toEqual(14);
        const pdfPage = await pdfDocument.getPage(10);
        expect(pdfPage.rotate).toEqual(0);
        expect(fetches).toEqual(0);
        await loadingTask.destroy();
      }
    );
  });
});