CMarkdown cannot create cells with row spans?

Using Yii 1.1.8

I tried CMarkdown widget with this data:




| Column 1 | Column 2 | Column 3 | Column 4 |

| -------- | :------: | -------- | -------- |

| No span  | Span across three columns    |||

supposedly the generated html table’s last cell should be a cell with rowspan=3, but I don’t see it.

Instead, it was regular cell followed by two blank cells. Can anyone help?