I think there are a couple of different ways you can go but my go-to solution is to comment that you actually need double the number of columns I see listed. So instead of 3 or 4 columns, you need 7, and every other column will house a line break tag: <br>, or <p>, whatever you like.
The extra columns will all look like this:
column.7.sharecol=true
column.7.textmode=true
column.7.value=<br>
column.7.valueformat=HTML