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
```

const characterScaleX = width / measuredWidth;
            restoreNeeded = true;
            ctx.save();
            ctx.scale(characterScaleX, 1);
            scaledX /= characterScaleX;
          } else if (width !== measuredWidth) {
            scaledX +=
              (((width - measuredWidth) / 2000) * fontSize) / fontSizeScale;
          }
        }
        
        
        if (this.contentVisible && (glyph.isInFont || font.missingFile)) {
          if (simpleFillText && !accent) {
            
            ctx.fillText(character, scaledX, scaledY);
          } else {
            this.paintChar(
              character,
              scaledX,
              scaledY,
              patternTransform,
              resetLineWidthToOne
            );
            if (accent) {
              const scaledAccentX =
                scaledX + (fontSize * accent.offset.x) / fontSizeScale;
              const scaledAccentY =
                scaledY - (fontSize * accent.offset.y) / fontSizeScale;
              this.paintChar(