xml of rss feed malformed in case of 'Alice began following Bob' (fix included) (BB-2858)

In the case of an RSS feed: https://bitbucket.org/rayburgemeestre/rss/feed?token=<some_token>

The "began following" events are malformed. Generated XML is:

    <title>
        rayburgemeestre began following SanderVellinga
    </link>

The "</link>" should have been a "</title>".

Ray Burgemeestre