Attach (recommended) or Link to PDF file here:
PDF is [Sample lease contract 26.pdf](https://github.com/mozilla/pdf.js/files/1500985/Sample.lease.contract.26.pdf)

Steps to reproduce the problem:
I am using [https://mozilla.github.io/pdf.js/web/viewer.html](url) to preview pdf by opening the pdf.

now am searching for "**made is**" but its not showing in the pdfjs

and while selecting and copying pdf  text it has no space in b/w words

const newMap = Object.create(null);
  const toFontChar = [];
  let privateUseAreaIndex = 0;
  let nextAvailableFontCharCode = PRIVATE_USE_AREAS[privateUseAreaIndex][0];
  let privateUseOffetEnd = PRIVATE_USE_AREAS[privateUseAreaIndex][1];
  for (let originalCharCode in charCodeToGlyphId) {
    originalCharCode |= 0;
    let glyphId = charCodeToGlyphId[originalCharCode];
    
    
    if (!hasGlyph(glyphId)) {
      continue;
    }
    if (nextAvailableFontCharCode > privateUseOffetEnd) {
      privateUseAreaIndex++;