This is a regression from #12864. The underscore is now too thin when the document is zoomed in.

URL: https://github.com/mozilla/pdf.js/files/2321540/issue6127.pdf
PDF.js 2.7.526: https://i.imgur.com/T4mIpct.png
PDF.js 2.7.510: https://i.imgur.com/nbwEpGT.png
Adobe Acrobat Reader DC 2020.013.20074: https://i.imgur.com/wDFBf3R.png

The screenshots were taken at 400% zoom.
} else {
        for (const depObjId of argsArray[i]) {
          const objsPool = depObjId.startsWith("g_") ? commonObjs : objs;
          
          
          if (!objsPool.has(depObjId)) {
            objsPool.get(depObjId, continueCallback);
            return i;
          }
        }
      }
      i++;
      
      if (i === argsArrayLen) {
        return i;
      }
      
      
      if (chunkOperations && ++steps > EXECUTION_STEPS) {
        if (Date.now() > endTime) {
          continueCallback();
          return i;
        }
        steps = 0;
      }
      
      
    }
  }
  endDrawing() {