Hirb gives you some nice outputs in the console, like:
+------------+--------+-----------+-------+--------------------------+
| to_s | ld | ajd | amjd | asctime |
+------------+--------+-----------+-------+--------------------------+
| 2009-03-11 | 155742 | 4909803/2 | 54901 | Wed Mar 11 00:00:00 2009 |
| 2009-04-11 | 155773 | 4909865/2 | 54932 | Sat Apr 11 00:00:00 2009 |
+------------+--------+-----------+-------+--------------------------+
What I'd like to do is find a way to automatically convert this to CSV, but I'm not aware of any Hirb configuration options that allow it. In the meantime I'm just stripping out the bars using find and replace in sublime text, but I'm sure there's a more elegant solution.