gaah, sorry about that. I've prepared another patch that removes the '^' part and adds an example about that.

About the reference to Collections.Set to be a link to the Collections page, do you think it's acceptable to define all the Collection ABCs as :class:`...` ? I looked at http://docs.python.org/documenting/markup.html but didn't find a specific markup for ABC, so I suppose 'class' is fine.

If you think it might worth the effort, I can mark those ABCs up as class, and scan the documentation for references to them and convert to link (if not already done automagically).