Fix license headers

src/main/java/net/minecraftforge/common/ModDimension.java

@@ -16,6 +16,7 @@
  * License along with this library; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  */
+
 package net.minecraftforge.common;
 
 import java.util.function.Function;