Summary:
The Doxygen header has an opening @\{ with no matching @\}, which
Doxygen will complain about. There is no explicit grouping associated
with the @\{, so I just removed it.
Test Plan: make doc 2> doxyerr.log
CC: cedric
Differential Revision: https://phab.enlightenment.org/D611
Signed-off-by: Cedric BAIL <cedric.bail@free.fr>