Add linebreaks to anonymouseditoracquisitionpostedit-description

This message has a lot of HTML. Adding linebreaks will make it
easier for translators to handle.

Change-Id: Id60fbc156d6cb0817da85930abe2214bd480089f
(cherry picked from commit 8cd2966c4afadd391d2a9c429f244947e47b3759)