More source headers harmonization

* fix missing #ifdefs
* remove spaces and page feeds
* follow same set of rules everywhere, with cdio includes coming
  after standard C includes.

test/testassert.c

@@ -14,10 +14,9 @@
     You should have received a copy of the GNU General Public License
     along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
-
 #ifdef HAVE_CONFIG_H
-# include "config.h"
-# define __CDIO_CONFIG_H__ 1
+#include "config.h"
+#define __CDIO_CONFIG_H__ 1
 #endif
 
 /* Private headers */