Grid table pipes
================

+------------------------+------------+----------+----------+
| Header row, column 1   | Header 2   | Header 3 | Header 4 |
| (header rows optional) |            |          |          |
+========================+============+==========+==========+
| body row 5             | Cells may span rows *and*        |
+------------------------+ columns.                         |
| body row 6             |                                  |
+------------------------+----------------------------------+