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

}
          if (unicodeOrCharCode === undefined) {
            
            
            if (
              !properties.glyphNames &&
              properties.hasIncludedToUnicodeMap &&
              !(this.toUnicode instanceof IdentityToUnicodeMap)
            ) {
              const unicode = this.toUnicode.get(charCode);
              if (unicode) {
                unicodeOrCharCode = unicode.codePointAt(0);
              }
            }
            if (unicodeOrCharCode === undefined) {
              continue; 
            }
          }
          for (let i = 0; i < cmapMappingsLength; ++i) {
            if (cmapMappings[i].charCode !== unicodeOrCharCode) {
              continue;
            }
            charCodeToGlyphId[charCode] = cmapMappings[i].glyphId;
            break;
          }
        }
      } else if (cmapPlatformId === 0) {
        
        for (let i = 0; i < cmapMappingsLength; ++i) {
          charCodeToGlyphId[cmapMappings[i].charCode] = cmapMappings[i].glyphId;