Ahh right, when you indent stuff underneath a tag in HAML, it does the
same indented form in the output HTML, which adds whitespace that
creates a problem for how we're doing this list.
Before this change, the "Engulfed in Flames Effect" item showed below
the preview: `Occupies: Background Item , Lower Foreground Item`, with
an extra space before the comma.
After this change, it now shows
`Occupies: Background Item, Lower Foreground Item`, as intended.