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

let fontCharCode, width, operatorListId;
    let widthCode = charcode;
    if (this.cMap && this.cMap.contains(charcode)) {
      widthCode = this.cMap.lookup(charcode);
      if (typeof widthCode === "string") {
        widthCode = convertCidString(charcode, widthCode);
      }
    }
    width = this.widths[widthCode];
    width = isNum(width) ? width : this.defaultWidth;
    const vmetric = this.vmetrics && this.vmetrics[widthCode];
    let unicode = this.toUnicode.get(charcode) || charcode;
    if (typeof unicode === "number") {
      unicode = String.fromCharCode(unicode);
    }
    let isInFont = this.toFontChar[charcode] !== undefined;
    
    
    fontCharCode = this.toFontChar[charcode] || charcode;
    if (this.missingFile) {
      const glyphName =
        this.differences[charcode] || this.defaultEncoding[charcode];
      if (
        (glyphName === ".notdef" || glyphName === "") &&
        this.type === "Type1"