Restore the empty line after the license (#6088)

substrate/client/network/test/src/block_import.rs

@@ -15,6 +15,7 @@
 
 // You should have received a copy of the GNU General Public License
 // along with this program. If not, see <https://www.gnu.org/licenses/>.
+
 //! Testing block import logic.
 
 use sp_consensus::ImportedAux;

substrate/client/network/test/src/sync.rs

@@ -15,6 +15,7 @@
 
 // You should have received a copy of the GNU General Public License
 // along with this program. If not, see <https://www.gnu.org/licenses/>.
+
 use sp_consensus::BlockOrigin;
 use std::time::Duration;
 use futures::executor::block_on;