Restore the empty line after the license (#6088)

substrate/client/executor/common/src/error.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/>.
+
 //! Rust executor possible errors.
 
 use sp_serializer;

substrate/client/executor/common/src/sandbox.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/>.
+
 //! This module implements sandboxing support in the runtime.
 //!
 //! Sandboxing is baked by wasmi at the moment. In future, however, we would like to add/switch to

substrate/client/executor/common/src/util.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/>.
+
 //! A set of utilities for resetting a wasm instance to its initial state.
 
 use crate::error::{self, Error};