There are a lot of questions recently trying to include example data or output in tabular format. However, since people (especially new users) clearly don't know how to format these properly, I find myself fixing a lot of these recently.
I'd say the sidebar to the right doesn't really help until you click "full reference". Maybe a little blurb about the
<pre> tag is worth adding to the "How to Format" sidebar?
(Now, some people have gotten so far as to indent each line by 4 spaces, but this causes it to be parsed and syntax-highlighted, which is admittedly a bit of a pet peeve that I inevitably edit out as well.)