Wikimedia Bugzilla is closed!

Example in the URL field.
In this case, the highlighted reference is split across two columns.  Is there some form of CSS that may be applied to citations to prevent this?  It is very confusing, especially to people unfamiliar with MediaWiki's citation system.  

To reproduce:
1) Use or copy to the test wiki [[w:Template:reflist]] (on the English Wikipedia).
2) create a large collection of citations (fill them with any form of nonsense text you please)
3) Sometimes the last citation in the first or second column will "overflow" onto the next column.

I don't think this is a problem with [[w:Template:reflist]]

What should happen:
The ends of columns of references must always coincide with the ends of references themselves.  If a ref is too long, it should be moved to the next column, without splitting.

Setting Component to "General/Unknown" since none of the components seemed to have particular relevance (I looked for a "references" or "citations" but didn't see anything)