This is a regression from PR #4615. The underscore for the last 2 chars in "NUMERO D’IMMATRICULATION" is too bold.

URL: http://www.ameli.fr/fileadmin/user_upload/formulaires/S3706.pdf
1.1.215: https://i.imgur.com/up8Y33j.png
0.8.990: https://i.imgur.com/UioZcLB.png

fc1e2483b433134a538cce0acd0ccc76e335cf5f is the first bad commit
commit fc1e2483b433134a538cce0acd0ccc76e335cf5f
Author: Jonas Jenwald
Date:   Fri Apr 11 20:19:39 2014 +0200

```
Enforce minimum line widths
```

},
    beginAnnotation: function CanvasGraphics_beginAnnotation(
      rect,
      transform,
      matrix
    ) {
      this.save();
      resetCtxToDefault(this.ctx);
      this.current = new CanvasExtraState();
      if (Array.isArray(rect) && rect.length === 4) {
        const width = rect[2] - rect[0];
        const height = rect[3] - rect[1];
        this.ctx.rect(rect[0], rect[1], width, height);
        this.clip();
        this.endPath();
      }
      this.transform.apply(this, transform);
      this.transform.apply(this, matrix);
    },
    endAnnotation: function CanvasGraphics_endAnnotation() {
      this.restore();
    },
    paintImageMaskXObject: function CanvasGraphics_paintImageMaskXObject(img) {
      if (!this.contentVisible) {
        return;
      }
      const ctx = this.ctx;
      const width = img.width,
        height = img.height;
      const fillColor = this.current.fillColor;