Restore the empty line after the license (#6088)

substrate/client/db/src/cache/list_cache.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/>.
+
 //! List-based cache.
 //!
 //! Maintains several lists, containing nodes that are inserted whenever

substrate/client/db/src/cache/list_entry.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/>.
+
 //! List-cache storage entries.
 
 use sp_blockchain::Result as ClientResult;

substrate/client/db/src/cache/list_storage.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/>.
+
 //! List-cache storage definition and implementation.
 
 use std::sync::Arc;

substrate/client/db/src/cache/mod.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/>.
+
 //! DB-backed cache of blockchain data.
 
 use std::{sync::Arc, collections::{HashMap, hash_map::Entry}};