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

(baseEncoding.length || this.differences.length)
      ) {
        for (let i = 0; i < 256; ++i) {
          if (!forcePostTable && charCodeToGlyphId[i] !== undefined) {
            continue;
          }
          const glyphName = this.differences[i] || baseEncoding[i];
          if (!glyphName) {
            continue;
          }
          const glyphId = properties.glyphNames.indexOf(glyphName);
          if (glyphId > 0 && hasGlyph(glyphId)) {
            charCodeToGlyphId[i] = glyphId;
          }
        }
      }
    }
    if (charCodeToGlyphId.length === 0) {
      
      charCodeToGlyphId[0] = 0;
    }
    
    
    
    
    let glyphZeroId = numGlyphsOut - 1;
    if (!dupFirstEntry) {
      glyphZeroId = 0;
    }