Attach (recommended) or Link to PDF file here:
issue13500 (in test corpus)

This regressed when landing #13566. 

What is the expected behavior? (add screenshot)
<img width="664" alt="image" src="https://user-images.githubusercontent.com/942640/122467522-7bc8aa80-cf6f-11eb-9d4d-311eb7c64fb2.png">


What went wrong? (add screenshot)
![image](https://user-images.githubusercontent.com/942640/122467565-85eaa900-cf6f-11eb-9c10-8a8686ed440c.png)


const style = toStyle(this, "font", "margin", "para", "visibility");
    switch (this.placement) {
      case "left":
      case "right":
        if (this.reserve > 0) {
          style.width = measureToString(this.reserve);
        } else {
          style.minWidth = measureToString(this.reserve);
        }
        break;
      case "top":
      case "bottom":
        if (this.reserve > 0) {
          style.height = measureToString(this.reserve);
        } else {
          style.minHeight = measureToString(this.reserve);
        }
        break;
    }
    return HTMLResult.success({
      name: "div",
      attributes: {
        style,
        class: ["xfaCaption"],
      },
      children,
    });
  }
}
class Certificate extends StringObject {