Allow tables with colspan and rowspan #191
Description
like below
| Header | Header |
| --- | --- |
| > | This cell has colspan=2 |
| This cell has rowspan=2 | aaa |
| ^ | aaa|{{ message }}
like below
| Header | Header |
| --- | --- |
| > | This cell has colspan=2 |
| This cell has rowspan=2 | aaa |
| ^ | aaa|