fix build

doc/starpu.texi

@@ -2756,12 +2756,12 @@ subdata according to the filter @code{f}
 @item @emph{Example}:
 @cartouche
 @smallexample
-struct starpu_data_filter f = {
+struct starpu_data_filter f = @{
     .filter_func = starpu_vertical_block_filter_func,
     .nchildren = nslicesx,
     .get_nchildren = NULL,
     .get_child_ops = NULL
-};
+@};
 starpu_data_partition(A_handle, &f);
 @end smallexample
 @end cartouche