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
```

if (
        this.current.activeSMask !== null &&
        (this.stateStack.length === 0 ||
          this.stateStack[this.stateStack.length - 1].activeSMask !==
            this.current.activeSMask)
      ) {
        this.endSMaskGroup();
      }
      if (this.stateStack.length !== 0) {
        this.current = this.stateStack.pop();
        this.ctx.restore();
        
        this.pendingClip = null;
        this._cachedGetSinglePixelWidth = null;
      } else {
        
        this.current.activeSMask = null;
      }
    },
    transform: function CanvasGraphics_transform(a, b, c, d, e, f) {
      this.ctx.transform(a, b, c, d, e, f);
      this._cachedGetSinglePixelWidth = null;
    },
    
    constructPath: function CanvasGraphics_constructPath(ops, args) {
      const ctx = this.ctx;
      const current = this.current;
      let x = current.x,