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)


this.columnWidths = (attributes.columnWidths || "")
      .trim()
      .split(/\s+/)
      .map(x => (x === "-1" ? -1 : getMeasurement(x)));
    this.h = attributes.h ? getMeasurement(attributes.h) : "";
    this.hAlign = getStringOption(attributes.hAlign, [
      "left",
      "center",
      "justify",
      "justifyAll",
      "radix",
      "right",
    ]);
    this.id = attributes.id || "";
    this.layout = getStringOption(attributes.layout, [
      "position",
      "lr-tb",
      "rl-row",
      "rl-tb",
      "row",
      "table",
      "tb",
    ]);
    this.locale = attributes.locale || "";
    this.maxH = getMeasurement(attributes.maxH, "0pt");
    this.maxW = getMeasurement(attributes.maxW, "0pt");
    this.mergeMode = getStringOption(attributes.mergeMode, [
      "consumeData",
      "matchTemplate",
    ]);