diff --git a/client/api/src/call_executor.rs b/client/api/src/call_executor.rs
index e5b670579a4f0..d9d43900dfc94 100644
--- a/client/api/src/call_executor.rs
+++ b/client/api/src/call_executor.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 method call executor interface.
 
 use std::{panic::UnwindSafe, result, cell::RefCell};
diff --git a/client/api/src/cht.rs b/client/api/src/cht.rs
index ef282868c941e..30cfd3a1b671b 100644
--- a/client/api/src/cht.rs
+++ b/client/api/src/cht.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/>.
+
 //! Canonical hash trie definitions and helper functions.
 //!
 //! Each CHT is a trie mapping block numbers to canonical hash.
diff --git a/client/api/src/in_mem.rs b/client/api/src/in_mem.rs
index cb1724e468b56..0eb0681a82491 100644
--- a/client/api/src/in_mem.rs
+++ b/client/api/src/in_mem.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/>.
+
 //! In memory client backend
 
 use std::collections::HashMap;
diff --git a/client/api/src/leaves.rs b/client/api/src/leaves.rs
index c93446b94d37d..25f9f3d29b022 100644
--- a/client/api/src/leaves.rs
+++ b/client/api/src/leaves.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/>.
+
 //! Helper for managing the set of available leaves in the chain for DB implementations.
 
 use std::collections::BTreeMap;
diff --git a/client/api/src/notifications.rs b/client/api/src/notifications.rs
index c89e8b6dfd237..ec63c372c7e59 100644
--- a/client/api/src/notifications.rs
+++ b/client/api/src/notifications.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/>.
+
 //! Storage notifications
 
 use std::{
diff --git a/client/authority-discovery/src/tests.rs b/client/authority-discovery/src/tests.rs
index 106c68b2d0985..12edcf5fc9008 100644
--- a/client/authority-discovery/src/tests.rs
+++ b/client/authority-discovery/src/tests.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 std::{iter::FromIterator, sync::{Arc, Mutex}};
 
 use futures::channel::mpsc::channel;
diff --git a/client/basic-authorship/src/lib.rs b/client/basic-authorship/src/lib.rs
index 7c77dde6b02a1..f5f2c089f656e 100644
--- a/client/basic-authorship/src/lib.rs
+++ b/client/basic-authorship/src/lib.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/>.
+
 //! Basic implementation of block-authoring logic.
 //!
 //! # Example
diff --git a/client/block-builder/src/lib.rs b/client/block-builder/src/lib.rs
index f630d42a9b2d4..af40b336623d8 100644
--- a/client/block-builder/src/lib.rs
+++ b/client/block-builder/src/lib.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/>.
+
 //! Substrate block builder
 //!
 //! This crate provides the [`BlockBuilder`] utility and the corresponding runtime api
diff --git a/client/chain-spec/src/chain_spec.rs b/client/chain-spec/src/chain_spec.rs
index a6bf6212e1a9d..52414f8687c96 100644
--- a/client/chain-spec/src/chain_spec.rs
+++ b/client/chain-spec/src/chain_spec.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/>.
+
 //! Substrate chain configurations.
 
 use std::{borrow::Cow, fs::File, path::PathBuf, sync::Arc, collections::HashMap};
diff --git a/client/cli/src/commands/build_spec_cmd.rs b/client/cli/src/commands/build_spec_cmd.rs
index e5e7123b4b76c..2f9e2fa059b30 100644
--- a/client/cli/src/commands/build_spec_cmd.rs
+++ b/client/cli/src/commands/build_spec_cmd.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 crate::error;
 use crate::params::NodeKeyParams;
 use crate::params::SharedParams;
diff --git a/client/cli/src/commands/check_block_cmd.rs b/client/cli/src/commands/check_block_cmd.rs
index 35f26af6670dd..d1241f010d597 100644
--- a/client/cli/src/commands/check_block_cmd.rs
+++ b/client/cli/src/commands/check_block_cmd.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 crate::{
 	CliConfiguration, error, params::{ImportParams, SharedParams, BlockNumberOrHash},
 };
diff --git a/client/cli/src/commands/export_blocks_cmd.rs b/client/cli/src/commands/export_blocks_cmd.rs
index 431add4128b3f..2fdc408250bce 100644
--- a/client/cli/src/commands/export_blocks_cmd.rs
+++ b/client/cli/src/commands/export_blocks_cmd.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 crate::error;
 use crate::params::{BlockNumber, DatabaseParams, PruningParams, SharedParams};
 use crate::CliConfiguration;
diff --git a/client/cli/src/commands/export_state_cmd.rs b/client/cli/src/commands/export_state_cmd.rs
index ee022e1afd991..3ad6772882543 100644
--- a/client/cli/src/commands/export_state_cmd.rs
+++ b/client/cli/src/commands/export_state_cmd.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 crate::{
 	CliConfiguration, error, params::{PruningParams, SharedParams, BlockNumberOrHash},
 };
diff --git a/client/cli/src/commands/import_blocks_cmd.rs b/client/cli/src/commands/import_blocks_cmd.rs
index 029e4475627ee..e138850c8bfd3 100644
--- a/client/cli/src/commands/import_blocks_cmd.rs
+++ b/client/cli/src/commands/import_blocks_cmd.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 crate::error;
 use crate::params::ImportParams;
 use crate::params::SharedParams;
diff --git a/client/cli/src/commands/purge_chain_cmd.rs b/client/cli/src/commands/purge_chain_cmd.rs
index 6b540a66a2e2b..9d364a45f7d09 100644
--- a/client/cli/src/commands/purge_chain_cmd.rs
+++ b/client/cli/src/commands/purge_chain_cmd.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 crate::error;
 use crate::params::{DatabaseParams, SharedParams};
 use crate::CliConfiguration;
diff --git a/client/cli/src/commands/revert_cmd.rs b/client/cli/src/commands/revert_cmd.rs
index ea6ba5ecf7a38..6117eaf4880bf 100644
--- a/client/cli/src/commands/revert_cmd.rs
+++ b/client/cli/src/commands/revert_cmd.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 crate::error;
 use crate::params::{BlockNumber, PruningParams, SharedParams};
 use crate::CliConfiguration;
diff --git a/client/cli/src/commands/run_cmd.rs b/client/cli/src/commands/run_cmd.rs
index c34a31e59b652..f87d5bea6eebe 100644
--- a/client/cli/src/commands/run_cmd.rs
+++ b/client/cli/src/commands/run_cmd.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 crate::arg_enums::RpcMethods;
 use crate::error::{Error, Result};
 use crate::params::ImportParams;
diff --git a/client/cli/src/config.rs b/client/cli/src/config.rs
index fb0101ec88536..fdaee929a678e 100644
--- a/client/cli/src/config.rs
+++ b/client/cli/src/config.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/>.
+
 //! Configuration trait for a CLI based on substrate
 
 use crate::arg_enums::Database;
diff --git a/client/cli/src/error.rs b/client/cli/src/error.rs
index fa336974d626d..23c2bf05f0a14 100644
--- a/client/cli/src/error.rs
+++ b/client/cli/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/>.
+
 //! Initialization errors.
 
 /// Result type alias for the CLI.
diff --git a/client/cli/src/lib.rs b/client/cli/src/lib.rs
index 271572b43d10a..36d3649926f90 100644
--- a/client/cli/src/lib.rs
+++ b/client/cli/src/lib.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/>.
+
 //! Substrate CLI library.
 
 #![warn(missing_docs)]
diff --git a/client/cli/src/params/database_params.rs b/client/cli/src/params/database_params.rs
index 62b04367885e4..3ff8eb01d0643 100644
--- a/client/cli/src/params/database_params.rs
+++ b/client/cli/src/params/database_params.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 crate::arg_enums::Database;
 use structopt::StructOpt;
 
diff --git a/client/cli/src/params/import_params.rs b/client/cli/src/params/import_params.rs
index e1c86aec9b6bb..fb683df6d3be9 100644
--- a/client/cli/src/params/import_params.rs
+++ b/client/cli/src/params/import_params.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 crate::arg_enums::{
 	ExecutionStrategy, TracingReceiver, WasmExecutionMethod,
 	DEFAULT_EXECUTION_BLOCK_CONSTRUCTION, DEFAULT_EXECUTION_IMPORT_BLOCK,
diff --git a/client/cli/src/params/keystore_params.rs b/client/cli/src/params/keystore_params.rs
index 4dbd793456377..2fd610377d793 100644
--- a/client/cli/src/params/keystore_params.rs
+++ b/client/cli/src/params/keystore_params.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 crate::error::Result;
 use sc_service::config::KeystoreConfig;
 use std::fs;
diff --git a/client/cli/src/params/network_params.rs b/client/cli/src/params/network_params.rs
index e328c32a40c7b..c1639ad2b4370 100644
--- a/client/cli/src/params/network_params.rs
+++ b/client/cli/src/params/network_params.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 crate::params::node_key_params::NodeKeyParams;
 use sc_network::{
 	config::{NetworkConfiguration, NodeKeyConfig, NonReservedPeerMode, TransportConfig},
diff --git a/client/cli/src/params/node_key_params.rs b/client/cli/src/params/node_key_params.rs
index ede9fd02e121d..7d19971ad6470 100644
--- a/client/cli/src/params/node_key_params.rs
+++ b/client/cli/src/params/node_key_params.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 sc_network::config::NodeKeyConfig;
 use sp_core::H256;
 use std::{path::PathBuf, str::FromStr};
diff --git a/client/cli/src/params/pruning_params.rs b/client/cli/src/params/pruning_params.rs
index d96a44986dad7..36179359063e7 100644
--- a/client/cli/src/params/pruning_params.rs
+++ b/client/cli/src/params/pruning_params.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 crate::error;
 use sc_service::{PruningMode, Role};
 use structopt::StructOpt;
diff --git a/client/cli/src/params/shared_params.rs b/client/cli/src/params/shared_params.rs
index 94fb3ceea66fc..5bf81024668c3 100644
--- a/client/cli/src/params/shared_params.rs
+++ b/client/cli/src/params/shared_params.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 std::path::PathBuf;
 use structopt::StructOpt;
 
diff --git a/client/cli/src/params/transaction_pool_params.rs b/client/cli/src/params/transaction_pool_params.rs
index 00f5f0dbd6012..2283c0f39f9c7 100644
--- a/client/cli/src/params/transaction_pool_params.rs
+++ b/client/cli/src/params/transaction_pool_params.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 sc_service::config::TransactionPoolOptions;
 use structopt::StructOpt;
 
diff --git a/client/cli/src/runner.rs b/client/cli/src/runner.rs
index 1600aed7d694b..2d27743163ae4 100644
--- a/client/cli/src/runner.rs
+++ b/client/cli/src/runner.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 crate::CliConfiguration;
 use crate::Result;
 use crate::SubstrateCli;
diff --git a/client/consensus/aura/src/digests.rs b/client/consensus/aura/src/digests.rs
index 8ddcb2bee45ef..3332e4c6a6dff 100644
--- a/client/consensus/aura/src/digests.rs
+++ b/client/consensus/aura/src/digests.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/>.
+
 //! Aura (Authority-Round) digests
 //!
 //! This implements the digests for AuRa, to allow the private
diff --git a/client/consensus/babe/rpc/src/lib.rs b/client/consensus/babe/rpc/src/lib.rs
index 0c8a16e4daaf4..925328a856f07 100644
--- a/client/consensus/babe/rpc/src/lib.rs
+++ b/client/consensus/babe/rpc/src/lib.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/>.
+
 //! RPC api for babe.
 
 use sc_consensus_babe::{Epoch, authorship, Config};
diff --git a/client/consensus/manual-seal/src/error.rs b/client/consensus/manual-seal/src/error.rs
index 36499893c3694..2411a839b027c 100644
--- a/client/consensus/manual-seal/src/error.rs
+++ b/client/consensus/manual-seal/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/>.
+
 //! A manual sealing engine: the engine listens for rpc calls to seal blocks and create forks.
 //! This is suitable for a testing environment.
 use sp_consensus::{Error as ConsensusError, ImportResult};
diff --git a/client/consensus/manual-seal/src/lib.rs b/client/consensus/manual-seal/src/lib.rs
index de9711b2a8ec9..26f493d5d220c 100644
--- a/client/consensus/manual-seal/src/lib.rs
+++ b/client/consensus/manual-seal/src/lib.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 manual sealing engine: the engine listens for rpc calls to seal blocks and create forks.
 //! This is suitable for a testing environment.
 
diff --git a/client/consensus/pow/src/lib.rs b/client/consensus/pow/src/lib.rs
index b0d1e04348f3b..2628a11d3baea 100644
--- a/client/consensus/pow/src/lib.rs
+++ b/client/consensus/pow/src/lib.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/>.
+
 //! Proof of work consensus for Substrate.
 //!
 //! To use this engine, you can need to have a struct that implements
diff --git a/client/db/src/bench.rs b/client/db/src/bench.rs
index 3b31a37b14900..807e8c68e1875 100644
--- a/client/db/src/bench.rs
+++ b/client/db/src/bench.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/>.
+
 //! State backend that's useful for benchmarking
 
 use std::sync::Arc;
diff --git a/client/db/src/cache/list_cache.rs b/client/db/src/cache/list_cache.rs
index a2af053e87a63..0856350fb0910 100644
--- a/client/db/src/cache/list_cache.rs
+++ b/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
diff --git a/client/db/src/cache/list_entry.rs b/client/db/src/cache/list_entry.rs
index 39dee59d556fd..565a62cff4f2d 100644
--- a/client/db/src/cache/list_entry.rs
+++ b/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;
diff --git a/client/db/src/cache/list_storage.rs b/client/db/src/cache/list_storage.rs
index 1fa26552e9d4d..377d744effa60 100644
--- a/client/db/src/cache/list_storage.rs
+++ b/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;
diff --git a/client/db/src/cache/mod.rs b/client/db/src/cache/mod.rs
index 03cda1b589cca..2b7cd2e62076e 100644
--- a/client/db/src/cache/mod.rs
+++ b/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}};
diff --git a/client/db/src/lib.rs b/client/db/src/lib.rs
index 75d36dde5c8b0..037409dfc4376 100644
--- a/client/db/src/lib.rs
+++ b/client/db/src/lib.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/>.
+
 //! Client backend that is backed by a database.
 //!
 //! # Canonicality vs. Finality
diff --git a/client/db/src/light.rs b/client/db/src/light.rs
index 8607823462ebe..f115ac9599e8d 100644
--- a/client/db/src/light.rs
+++ b/client/db/src/light.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/>.
+
 //! RocksDB-based light client blockchain storage.
 
 use std::{sync::Arc, collections::HashMap};
diff --git a/client/db/src/offchain.rs b/client/db/src/offchain.rs
index a7cc1345d198f..651510d6e887e 100644
--- a/client/db/src/offchain.rs
+++ b/client/db/src/offchain.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/>.
+
 //! RocksDB-based offchain workers local storage.
 
 use std::{
diff --git a/client/db/src/stats.rs b/client/db/src/stats.rs
index 7a265ddf823fb..8d208024b4bb2 100644
--- a/client/db/src/stats.rs
+++ b/client/db/src/stats.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/>.
+
 //! Database usage statistics
 
 use std::sync::atomic::{AtomicU64, Ordering as AtomicOrdering};
diff --git a/client/db/src/utils.rs b/client/db/src/utils.rs
index c05a41125844e..80b08b3a6e59c 100644
--- a/client/db/src/utils.rs
+++ b/client/db/src/utils.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-based backend utility structures and functions, used by both
 //! full and light storages.
 
diff --git a/client/executor/common/src/error.rs b/client/executor/common/src/error.rs
index 8fc0c4392cc4a..04850e6f8dd7e 100644
--- a/client/executor/common/src/error.rs
+++ b/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;
diff --git a/client/executor/common/src/sandbox.rs b/client/executor/common/src/sandbox.rs
index 37860474cb07c..b2c35b7582718 100644
--- a/client/executor/common/src/sandbox.rs
+++ b/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
diff --git a/client/executor/common/src/util.rs b/client/executor/common/src/util.rs
index ebd14a5a6e45f..92a48e1401814 100644
--- a/client/executor/common/src/util.rs
+++ b/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};
diff --git a/client/executor/src/integration_tests/sandbox.rs b/client/executor/src/integration_tests/sandbox.rs
index 8fe76789553e3..f84e446b416c0 100644
--- a/client/executor/src/integration_tests/sandbox.rs
+++ b/client/executor/src/integration_tests/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/>.
+
 use super::{TestExternalities, call_in_wasm};
 use crate::WasmExecutionMethod;
 
diff --git a/client/executor/src/lib.rs b/client/executor/src/lib.rs
index a8b86da71449c..c02568c734b69 100644
--- a/client/executor/src/lib.rs
+++ b/client/executor/src/lib.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 crate that provides means of executing/dispatching calls into the runtime.
 //!
 //! There are a few responsibilities of this crate at the moment:
diff --git a/client/executor/src/native_executor.rs b/client/executor/src/native_executor.rs
index 95f5dff8c6cfd..b1eb504d5a2b3 100644
--- a/client/executor/src/native_executor.rs
+++ b/client/executor/src/native_executor.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 crate::{
 	RuntimeInfo, error::{Error, Result},
 	wasm_runtime::{RuntimeCache, WasmExecutionMethod},
diff --git a/client/executor/wasmtime/src/imports.rs b/client/executor/wasmtime/src/imports.rs
index b427606c3c36f..36752d72fa023 100644
--- a/client/executor/wasmtime/src/imports.rs
+++ b/client/executor/wasmtime/src/imports.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 crate::state_holder;
 use sc_executor_common::error::WasmError;
 use sp_wasm_interface::{Function, Value, ValueType};
diff --git a/client/executor/wasmtime/src/instance_wrapper.rs b/client/executor/wasmtime/src/instance_wrapper.rs
index 8b0b5cf382ecd..9026b8054e652 100644
--- a/client/executor/wasmtime/src/instance_wrapper.rs
+++ b/client/executor/wasmtime/src/instance_wrapper.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/>.
+
 //! Defines data and logic needed for interaction with an WebAssembly instance of a substrate
 //! runtime module.
 
diff --git a/client/executor/wasmtime/src/instance_wrapper/globals_snapshot.rs b/client/executor/wasmtime/src/instance_wrapper/globals_snapshot.rs
index db2cc28e684fb..01d82451fcbbb 100644
--- a/client/executor/wasmtime/src/instance_wrapper/globals_snapshot.rs
+++ b/client/executor/wasmtime/src/instance_wrapper/globals_snapshot.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 super::InstanceWrapper;
 use sc_executor_common::{
 	error::{Error, Result},
diff --git a/client/executor/wasmtime/src/state_holder.rs b/client/executor/wasmtime/src/state_holder.rs
index ac5b64c774e6e..711d3bb735d7c 100644
--- a/client/executor/wasmtime/src/state_holder.rs
+++ b/client/executor/wasmtime/src/state_holder.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 crate::host::{HostContext, HostState};
 
 scoped_tls::scoped_thread_local!(static HOST_STATE: HostState);
diff --git a/client/finality-grandpa/rpc/src/error.rs b/client/finality-grandpa/rpc/src/error.rs
index 73c36f23f5971..bfd0596fdf320 100644
--- a/client/finality-grandpa/rpc/src/error.rs
+++ b/client/finality-grandpa/rpc/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/>.
+
 use crate::NOT_READY_ERROR_CODE;
 
 #[derive(derive_more::Display, derive_more::From)]
diff --git a/client/finality-grandpa/rpc/src/lib.rs b/client/finality-grandpa/rpc/src/lib.rs
index 6d8e10622b962..1af84b7a84413 100644
--- a/client/finality-grandpa/rpc/src/lib.rs
+++ b/client/finality-grandpa/rpc/src/lib.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/>.
+
 //! RPC API for GRANDPA.
 #![warn(missing_docs)]
 
diff --git a/client/finality-grandpa/rpc/src/report.rs b/client/finality-grandpa/rpc/src/report.rs
index 19b89c50839e4..a635728cb938a 100644
--- a/client/finality-grandpa/rpc/src/report.rs
+++ b/client/finality-grandpa/rpc/src/report.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 std::{
 	collections::{BTreeSet, HashSet},
 	fmt::Debug,
diff --git a/client/finality-grandpa/src/authorities.rs b/client/finality-grandpa/src/authorities.rs
index 2105d9ed389ec..b4cb254864df7 100644
--- a/client/finality-grandpa/src/authorities.rs
+++ b/client/finality-grandpa/src/authorities.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/>.
+
 //! Utilities for dealing with authorities, authority sets, and handoffs.
 
 use fork_tree::ForkTree;
diff --git a/client/finality-grandpa/src/communication/mod.rs b/client/finality-grandpa/src/communication/mod.rs
index 533acb8de65f5..abd1c27983a6d 100644
--- a/client/finality-grandpa/src/communication/mod.rs
+++ b/client/finality-grandpa/src/communication/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/>.
+
 //! Communication streams for the polite-grandpa networking protocol.
 //!
 //! GRANDPA nodes communicate over a gossip network, where messages are not sent to
diff --git a/client/finality-grandpa/src/environment.rs b/client/finality-grandpa/src/environment.rs
index 85816b110bc92..afcc3891ac39f 100644
--- a/client/finality-grandpa/src/environment.rs
+++ b/client/finality-grandpa/src/environment.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 std::collections::BTreeMap;
 use std::iter::FromIterator;
 use std::pin::Pin;
diff --git a/client/finality-grandpa/src/finality_proof.rs b/client/finality-grandpa/src/finality_proof.rs
index 82a5220d87503..55f6376579db4 100644
--- a/client/finality-grandpa/src/finality_proof.rs
+++ b/client/finality-grandpa/src/finality_proof.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/>.
+
 //! GRANDPA block finality proof generation and check.
 //!
 //! Finality of block B is proved by providing:
diff --git a/client/finality-grandpa/src/import.rs b/client/finality-grandpa/src/import.rs
index 3f3bcc0d8c842..7e3799b1e25e1 100644
--- a/client/finality-grandpa/src/import.rs
+++ b/client/finality-grandpa/src/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/>.
+
 use std::{sync::Arc, collections::HashMap};
 
 use log::{debug, trace};
diff --git a/client/finality-grandpa/src/justification.rs b/client/finality-grandpa/src/justification.rs
index 7f86f7e443a58..b4db81f8a42bf 100644
--- a/client/finality-grandpa/src/justification.rs
+++ b/client/finality-grandpa/src/justification.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 std::collections::{HashMap, HashSet};
 use std::sync::Arc;
 
diff --git a/client/finality-grandpa/src/lib.rs b/client/finality-grandpa/src/lib.rs
index 41dedc2246aa0..7b20d082a01ab 100644
--- a/client/finality-grandpa/src/lib.rs
+++ b/client/finality-grandpa/src/lib.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/>.
+
 //! Integration of the GRANDPA finality gadget into substrate.
 //!
 //! This crate is unstable and the API and usage may change.
diff --git a/client/finality-grandpa/src/observer.rs b/client/finality-grandpa/src/observer.rs
index ee203a225d362..cd678b3bb4542 100644
--- a/client/finality-grandpa/src/observer.rs
+++ b/client/finality-grandpa/src/observer.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 std::pin::Pin;
 use std::sync::Arc;
 use std::task::{Context, Poll};
diff --git a/client/finality-grandpa/src/tests.rs b/client/finality-grandpa/src/tests.rs
index dbc54a0d64d1e..25e6253652001 100644
--- a/client/finality-grandpa/src/tests.rs
+++ b/client/finality-grandpa/src/tests.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/>.
+
 //! Tests and test helpers for GRANDPA.
 
 use super::*;
diff --git a/client/finality-grandpa/src/until_imported.rs b/client/finality-grandpa/src/until_imported.rs
index 6be1a1b1bef03..6a39c2637eb7b 100644
--- a/client/finality-grandpa/src/until_imported.rs
+++ b/client/finality-grandpa/src/until_imported.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/>.
+
 //! Helper stream for waiting until one or more blocks are imported before
 //! passing through inner items. This is done in a generic way to support
 //! many different kinds of items.
diff --git a/client/finality-grandpa/src/voting_rule.rs b/client/finality-grandpa/src/voting_rule.rs
index d0c47037ab3c8..60493867ce1f4 100644
--- a/client/finality-grandpa/src/voting_rule.rs
+++ b/client/finality-grandpa/src/voting_rule.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/>.
+
 //! Handling custom voting rules for GRANDPA.
 //!
 //! This exposes the `VotingRule` trait used to implement arbitrary voting
diff --git a/client/informant/src/lib.rs b/client/informant/src/lib.rs
index 891e9c0211347..6eea9c1d0434c 100644
--- a/client/informant/src/lib.rs
+++ b/client/informant/src/lib.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/>.
+
 //! Console informant. Prints sync progress and block events. Runs on the calling thread.
 
 use ansi_term::Colour;
diff --git a/client/network-gossip/src/state_machine.rs b/client/network-gossip/src/state_machine.rs
index 0d8ad50970b35..da07bde3e7d1a 100644
--- a/client/network-gossip/src/state_machine.rs
+++ b/client/network-gossip/src/state_machine.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 crate::{Network, MessageIntent, Validator, ValidatorContext, ValidationResult};
 
 use std::collections::{HashMap, HashSet};
diff --git a/client/network-gossip/src/validator.rs b/client/network-gossip/src/validator.rs
index cd0a733c91667..fd29aaddafe6d 100644
--- a/client/network-gossip/src/validator.rs
+++ b/client/network-gossip/src/validator.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 sc_network::{ObservedRole, PeerId};
 use sp_runtime::traits::Block as BlockT;
 
diff --git a/client/network/src/chain.rs b/client/network/src/chain.rs
index f79cf6f61e15b..20fbe0284397d 100644
--- a/client/network/src/chain.rs
+++ b/client/network/src/chain.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/>.
+
 //! Blockchain access trait
 
 use sp_blockchain::{Error, HeaderBackend, HeaderMetadata};
diff --git a/client/network/src/config.rs b/client/network/src/config.rs
index c1534c6d9c909..394e8fc01a471 100644
--- a/client/network/src/config.rs
+++ b/client/network/src/config.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/>.
+
 //! Configuration of the networking layer.
 //!
 //! The [`Params`] struct is the struct that must be passed in order to initialize the networking.
diff --git a/client/network/src/error.rs b/client/network/src/error.rs
index e46273c47baa8..fed7a331da93c 100644
--- a/client/network/src/error.rs
+++ b/client/network/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/>.
+
 //! Substrate network possible errors.
 
 use libp2p::{PeerId, Multiaddr};
diff --git a/client/network/src/network_state.rs b/client/network/src/network_state.rs
index ca6733de81d33..970a63faed4ea 100644
--- a/client/network/src/network_state.rs
+++ b/client/network/src/network_state.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/>.
+
 //! Information about the networking, for diagnostic purposes.
 //!
 //! **Warning**: These APIs are not stable.
diff --git a/client/network/src/on_demand_layer.rs b/client/network/src/on_demand_layer.rs
index c76ebb0351f4a..084172ee57c4f 100644
--- a/client/network/src/on_demand_layer.rs
+++ b/client/network/src/on_demand_layer.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/>.
+
 //! On-demand requests service.
 
 use crate::light_client_handler;
diff --git a/client/network/src/protocol.rs b/client/network/src/protocol.rs
index 8a71494d8294d..b3c08320f956b 100644
--- a/client/network/src/protocol.rs
+++ b/client/network/src/protocol.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 crate::{
 	ExHashT,
 	chain::{Client, FinalityProofProvider},
diff --git a/client/network/src/protocol/generic_proto/handler/notif_in.rs b/client/network/src/protocol/generic_proto/handler/notif_in.rs
index 68708b9fb7ba8..ef4644c548a4f 100644
--- a/client/network/src/protocol/generic_proto/handler/notif_in.rs
+++ b/client/network/src/protocol/generic_proto/handler/notif_in.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/>.
+
 //! Implementations of the `IntoProtocolsHandler` and `ProtocolsHandler` traits for ingoing
 //! substreams for a single gossiping protocol.
 //!
diff --git a/client/network/src/protocol/generic_proto/upgrade/legacy.rs b/client/network/src/protocol/generic_proto/upgrade/legacy.rs
index aba7fda2c3efb..13560113bb1a2 100644
--- a/client/network/src/protocol/generic_proto/upgrade/legacy.rs
+++ b/client/network/src/protocol/generic_proto/upgrade/legacy.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 crate::config::ProtocolId;
 use bytes::BytesMut;
 use futures::prelude::*;
diff --git a/client/network/src/protocol/message.rs b/client/network/src/protocol/message.rs
index 5baa8ed78fd78..bb2253b733864 100644
--- a/client/network/src/protocol/message.rs
+++ b/client/network/src/protocol/message.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/>.
+
 //! Network packet message types. These get serialized and put into the lower level protocol payload.
 
 use bitflags::bitflags;
diff --git a/client/network/src/protocol/sync/blocks.rs b/client/network/src/protocol/sync/blocks.rs
index 8d7e375d08820..b64c9e053e97b 100644
--- a/client/network/src/protocol/sync/blocks.rs
+++ b/client/network/src/protocol/sync/blocks.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 std::cmp;
 use std::ops::Range;
 use std::collections::{HashMap, BTreeMap};
diff --git a/client/network/src/protocol/sync/extra_requests.rs b/client/network/src/protocol/sync/extra_requests.rs
index 5df77a8228e81..6d688c130fafd 100644
--- a/client/network/src/protocol/sync/extra_requests.rs
+++ b/client/network/src/protocol/sync/extra_requests.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_blockchain::Error as ClientError;
 use crate::protocol::sync::{PeerSync, PeerSyncState};
 use fork_tree::ForkTree;
diff --git a/client/network/src/schema.rs b/client/network/src/schema.rs
index c736b5c652d5e..44fbbffd25406 100644
--- a/client/network/src/schema.rs
+++ b/client/network/src/schema.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/>.
+
 //! Include sources generated from protobuf definitions.
 
 pub mod v1 {
diff --git a/client/network/src/service.rs b/client/network/src/service.rs
index 331580ecb40aa..4a52bfebdd8ce 100644
--- a/client/network/src/service.rs
+++ b/client/network/src/service.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/>.
+
 //! Main entry point of the sc-network crate.
 //!
 //! There are two main structs in this module: [`NetworkWorker`] and [`NetworkService`].
diff --git a/client/network/src/service/out_events.rs b/client/network/src/service/out_events.rs
index 024b974266974..4a631601a669e 100644
--- a/client/network/src/service/out_events.rs
+++ b/client/network/src/service/out_events.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/>.
+
 //! Registering events streams.
 //!
 //! This code holds the logic that is used for the network service to inform other parts of
diff --git a/client/network/src/service/tests.rs b/client/network/src/service/tests.rs
index cd1ac85497dc8..8eaa98449213c 100644
--- a/client/network/src/service/tests.rs
+++ b/client/network/src/service/tests.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 crate::{config, Event, NetworkService, NetworkWorker};
 
 use futures::prelude::*;
diff --git a/client/network/src/transport.rs b/client/network/src/transport.rs
index 7b4221143358a..0c9a809384e4c 100644
--- a/client/network/src/transport.rs
+++ b/client/network/src/transport.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 futures::prelude::*;
 use libp2p::{
 	InboundUpgradeExt, OutboundUpgradeExt, PeerId, Transport,
diff --git a/client/network/test/src/block_import.rs b/client/network/test/src/block_import.rs
index 34199abde22c9..ef6ac9268f26a 100644
--- a/client/network/test/src/block_import.rs
+++ b/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;
diff --git a/client/network/test/src/sync.rs b/client/network/test/src/sync.rs
index a87badead768d..13d04a8c4e81e 100644
--- a/client/network/test/src/sync.rs
+++ b/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;
diff --git a/client/peerset/src/lib.rs b/client/peerset/src/lib.rs
index bde3bf628c363..e5e8ec826fe3c 100644
--- a/client/peerset/src/lib.rs
+++ b/client/peerset/src/lib.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/>.
+
 //! Peer Set Manager (PSM). Contains the strategy for choosing which nodes the network should be
 //! connected to.
 
diff --git a/client/peerset/tests/fuzz.rs b/client/peerset/tests/fuzz.rs
index dbc688fd5e7a5..aa2de56923b22 100644
--- a/client/peerset/tests/fuzz.rs
+++ b/client/peerset/tests/fuzz.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 futures::prelude::*;
 use libp2p::PeerId;
 use rand::distributions::{Distribution, Uniform, WeightedIndex};
diff --git a/client/rpc-api/src/author/error.rs b/client/rpc-api/src/author/error.rs
index 192d0c279569a..e6ee36cdce19a 100644
--- a/client/rpc-api/src/author/error.rs
+++ b/client/rpc-api/src/author/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/>.
+
 //! Authoring RPC module errors.
 
 use crate::errors;
diff --git a/client/rpc-api/src/author/mod.rs b/client/rpc-api/src/author/mod.rs
index d99f854037d09..29f5b1d26e84c 100644
--- a/client/rpc-api/src/author/mod.rs
+++ b/client/rpc-api/src/author/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/>.
+
 //! Substrate block-author/full-node API.
 
 pub mod error;
diff --git a/client/rpc-api/src/chain/mod.rs b/client/rpc-api/src/chain/mod.rs
index 0d394acd0bb82..a7b26f3024248 100644
--- a/client/rpc-api/src/chain/mod.rs
+++ b/client/rpc-api/src/chain/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/>.
+
 //! Substrate blockchain API.
 
 pub mod error;
diff --git a/client/rpc-api/src/child_state/mod.rs b/client/rpc-api/src/child_state/mod.rs
index 21045677f4933..d956a7554f8ee 100644
--- a/client/rpc-api/src/child_state/mod.rs
+++ b/client/rpc-api/src/child_state/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/>.
+
 //! Substrate state API.
 
 use jsonrpc_derive::rpc;
diff --git a/client/rpc-api/src/errors.rs b/client/rpc-api/src/errors.rs
index a0c9c4cfbe158..4e1a5b10fc512 100644
--- a/client/rpc-api/src/errors.rs
+++ b/client/rpc-api/src/errors.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 log::warn;
 
 pub fn internal<E: ::std::fmt::Debug>(e: E) -> jsonrpc_core::Error {
diff --git a/client/rpc-api/src/helpers.rs b/client/rpc-api/src/helpers.rs
index 5ce9161ad5432..025fef1102c49 100644
--- a/client/rpc-api/src/helpers.rs
+++ b/client/rpc-api/src/helpers.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 jsonrpc_core::futures::prelude::*;
 use futures::{channel::oneshot, compat::Compat};
 
diff --git a/client/rpc-api/src/offchain/error.rs b/client/rpc-api/src/offchain/error.rs
index 6e9b531623435..ea5223f1ce7f9 100644
--- a/client/rpc-api/src/offchain/error.rs
+++ b/client/rpc-api/src/offchain/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/>.
+
 //! Offchain RPC errors.
 
 use jsonrpc_core as rpc;
diff --git a/client/rpc-api/src/offchain/mod.rs b/client/rpc-api/src/offchain/mod.rs
index c456e56a4d450..427b6a1cc017b 100644
--- a/client/rpc-api/src/offchain/mod.rs
+++ b/client/rpc-api/src/offchain/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/>.
+
 //! Substrate offchain API.
 
 pub mod error;
diff --git a/client/rpc-api/src/policy.rs b/client/rpc-api/src/policy.rs
index 3dc3bf85055e4..e6e3380e1a2b8 100644
--- a/client/rpc-api/src/policy.rs
+++ b/client/rpc-api/src/policy.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/>.
+
 //! Policy-related types.
 //!
 //! Contains a `DenyUnsafe` type that can be used to deny potentially unsafe
diff --git a/client/rpc-api/src/state/error.rs b/client/rpc-api/src/state/error.rs
index 2dabe309eee82..2fcca3c343f09 100644
--- a/client/rpc-api/src/state/error.rs
+++ b/client/rpc-api/src/state/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/>.
+
 //! State RPC errors.
 
 use crate::errors;
diff --git a/client/rpc-api/src/state/helpers.rs b/client/rpc-api/src/state/helpers.rs
index b740a8e33b4ea..0d176ea67f35b 100644
--- a/client/rpc-api/src/state/helpers.rs
+++ b/client/rpc-api/src/state/helpers.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/>.
+
 //! Substrate state API helpers.
 
 use sp_core::Bytes;
diff --git a/client/rpc-api/src/state/mod.rs b/client/rpc-api/src/state/mod.rs
index cec32a26c6279..1bfbb4786e677 100644
--- a/client/rpc-api/src/state/mod.rs
+++ b/client/rpc-api/src/state/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/>.
+
 //! Substrate state API.
 
 pub mod error;
diff --git a/client/rpc-api/src/subscriptions.rs b/client/rpc-api/src/subscriptions.rs
index 772e9d4ee804a..7feae662eeb1f 100644
--- a/client/rpc-api/src/subscriptions.rs
+++ b/client/rpc-api/src/subscriptions.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 std::collections::HashMap;
 use std::sync::{Arc, atomic::{self, AtomicUsize}};
 
diff --git a/client/rpc-api/src/system/error.rs b/client/rpc-api/src/system/error.rs
index bd75b86493d26..4897aa485cbe4 100644
--- a/client/rpc-api/src/system/error.rs
+++ b/client/rpc-api/src/system/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/>.
+
 //! System RPC module errors.
 
 use crate::system::helpers::Health;
diff --git a/client/rpc-api/src/system/helpers.rs b/client/rpc-api/src/system/helpers.rs
index fbc68de05abcd..5dbe93543d8e5 100644
--- a/client/rpc-api/src/system/helpers.rs
+++ b/client/rpc-api/src/system/helpers.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/>.
+
 //! Substrate system API helpers.
 
 use std::fmt;
diff --git a/client/rpc-api/src/system/mod.rs b/client/rpc-api/src/system/mod.rs
index 6a2026c978729..a7b746ee1b114 100644
--- a/client/rpc-api/src/system/mod.rs
+++ b/client/rpc-api/src/system/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/>.
+
 //! Substrate system API.
 
 pub mod error;
diff --git a/client/rpc-servers/src/lib.rs b/client/rpc-servers/src/lib.rs
index 3366343213154..6fe4586b6ee5e 100644
--- a/client/rpc-servers/src/lib.rs
+++ b/client/rpc-servers/src/lib.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/>.
+
 //! Substrate RPC servers.
 
 #![warn(missing_docs)]
diff --git a/client/rpc/src/author/mod.rs b/client/rpc/src/author/mod.rs
index fc23db95a8127..d59fad354ef3c 100644
--- a/client/rpc/src/author/mod.rs
+++ b/client/rpc/src/author/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/>.
+
 //! Substrate block-author/full-node API.
 
 #[cfg(test)]
diff --git a/client/rpc/src/author/tests.rs b/client/rpc/src/author/tests.rs
index a9caa6d91a88c..8c1b82028bd79 100644
--- a/client/rpc/src/author/tests.rs
+++ b/client/rpc/src/author/tests.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 super::*;
 
 use std::{mem, sync::Arc};
diff --git a/client/rpc/src/chain/mod.rs b/client/rpc/src/chain/mod.rs
index 8341724227504..6d53fbbb06f6e 100644
--- a/client/rpc/src/chain/mod.rs
+++ b/client/rpc/src/chain/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/>.
+
 //! Substrate blockchain API.
 
 mod chain_full;
diff --git a/client/rpc/src/chain/tests.rs b/client/rpc/src/chain/tests.rs
index 477438e286460..e86d1d547fbde 100644
--- a/client/rpc/src/chain/tests.rs
+++ b/client/rpc/src/chain/tests.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 super::*;
 use assert_matches::assert_matches;
 use substrate_test_runtime_client::{
diff --git a/client/rpc/src/lib.rs b/client/rpc/src/lib.rs
index 0ec44b5663949..f979b0ab6957e 100644
--- a/client/rpc/src/lib.rs
+++ b/client/rpc/src/lib.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/>.
+
 //! Substrate RPC implementation.
 //!
 //! A core implementation of Substrate RPC interfaces.
diff --git a/client/rpc/src/metadata.rs b/client/rpc/src/metadata.rs
index 3c2902694e716..0416b07a6797b 100644
--- a/client/rpc/src/metadata.rs
+++ b/client/rpc/src/metadata.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/>.
+
 //! RPC Metadata
 use std::sync::Arc;
 
diff --git a/client/rpc/src/offchain/mod.rs b/client/rpc/src/offchain/mod.rs
index f55148b451e70..f8d2bb6a50f9c 100644
--- a/client/rpc/src/offchain/mod.rs
+++ b/client/rpc/src/offchain/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/>.
+
 //! Substrate offchain API.
 
 #[cfg(test)]
diff --git a/client/rpc/src/offchain/tests.rs b/client/rpc/src/offchain/tests.rs
index f1fa925a35ee2..f65971a7ffe8a 100644
--- a/client/rpc/src/offchain/tests.rs
+++ b/client/rpc/src/offchain/tests.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 super::*;
 use assert_matches::assert_matches;
 use sp_core::{Bytes, offchain::storage::InMemOffchainStorage};
diff --git a/client/rpc/src/state/mod.rs b/client/rpc/src/state/mod.rs
index e4d6918afb5f3..168dc3e0105a4 100644
--- a/client/rpc/src/state/mod.rs
+++ b/client/rpc/src/state/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/>.
+
 //! Substrate state API.
 
 mod state_full;
diff --git a/client/rpc/src/state/tests.rs b/client/rpc/src/state/tests.rs
index a2756240534bf..a610cbbfc8285 100644
--- a/client/rpc/src/state/tests.rs
+++ b/client/rpc/src/state/tests.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 super::*;
 use super::state_full::split_range;
 use self::error::Error;
diff --git a/client/rpc/src/system/mod.rs b/client/rpc/src/system/mod.rs
index 92a5f61c893cf..4b8abbe144462 100644
--- a/client/rpc/src/system/mod.rs
+++ b/client/rpc/src/system/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/>.
+
 //! Substrate system API.
 
 #[cfg(test)]
diff --git a/client/rpc/src/system/tests.rs b/client/rpc/src/system/tests.rs
index e79e85f77125e..25ebd80953be6 100644
--- a/client/rpc/src/system/tests.rs
+++ b/client/rpc/src/system/tests.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 super::*;
 
 use sc_network::{self, PeerId};
diff --git a/client/service/src/builder.rs b/client/service/src/builder.rs
index 81a861d621f8d..cc7929e88c6e4 100644
--- a/client/service/src/builder.rs
+++ b/client/service/src/builder.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 crate::{Service, NetworkStatus, NetworkState, error::Error, DEFAULT_PROTOCOL_ID, MallocSizeOfWasm};
 use crate::{start_rpc_servers, build_network_future, TransactionPoolAdapter, TaskManager, SpawnTaskHandle};
 use crate::status_sinks;
diff --git a/client/service/src/chain_ops.rs b/client/service/src/chain_ops.rs
index f02161fc72d4c..5c7dca0da73dc 100644
--- a/client/service/src/chain_ops.rs
+++ b/client/service/src/chain_ops.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/>.
+
 //! Chain utilities.
 
 use crate::error;
diff --git a/client/service/src/client/block_rules.rs b/client/service/src/client/block_rules.rs
index 0d7e8effc6036..247d09197b604 100644
--- a/client/service/src/client/block_rules.rs
+++ b/client/service/src/client/block_rules.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/>.
+
 //! Client fixed chain specification rules
 
 use std::collections::{HashMap, HashSet};
diff --git a/client/service/src/client/call_executor.rs b/client/service/src/client/call_executor.rs
index d0304914ff3e3..049bd888b13c7 100644
--- a/client/service/src/client/call_executor.rs
+++ b/client/service/src/client/call_executor.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 std::{sync::Arc, panic::UnwindSafe, result, cell::RefCell};
 use codec::{Encode, Decode};
 use sp_runtime::{
diff --git a/client/service/src/client/client.rs b/client/service/src/client/client.rs
index 9db7b714e13d3..77b3f065f43dd 100644
--- a/client/service/src/client/client.rs
+++ b/client/service/src/client/client.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/>.
+
 //! Substrate Client
 
 use std::{
diff --git a/client/service/src/client/genesis.rs b/client/service/src/client/genesis.rs
index 9f68e209509ca..4df08025e3826 100644
--- a/client/service/src/client/genesis.rs
+++ b/client/service/src/client/genesis.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/>.
+
 //! Tool for creating the genesis block.
 
 use sp_runtime::traits::{Block as BlockT, Header as HeaderT, Hash as HashT, Zero};
diff --git a/client/service/src/client/light/blockchain.rs b/client/service/src/client/light/blockchain.rs
index 6076b386dc43f..c7b20de594d67 100644
--- a/client/service/src/client/light/blockchain.rs
+++ b/client/service/src/client/light/blockchain.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/>.
+
 //! Light client blockchain backend. Only stores headers and justifications of recent
 //! blocks. CHT roots are stored for headers of ancient blocks.
 
diff --git a/client/service/src/client/light/call_executor.rs b/client/service/src/client/light/call_executor.rs
index 0f6a8f13726c1..81be65339b696 100644
--- a/client/service/src/client/light/call_executor.rs
+++ b/client/service/src/client/light/call_executor.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/>.
+
 //! Methods that light client could use to execute runtime calls.
 
 use std::{
diff --git a/client/service/src/client/light/fetcher.rs b/client/service/src/client/light/fetcher.rs
index b62225c59cf91..542255496739a 100644
--- a/client/service/src/client/light/fetcher.rs
+++ b/client/service/src/client/light/fetcher.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/>.
+
 //! Light client data fetcher. Fetches requested data from remote full nodes.
 
 use std::sync::Arc;
diff --git a/client/service/src/client/light/mod.rs b/client/service/src/client/light/mod.rs
index 32288d7b8b158..a3456f96a3786 100644
--- a/client/service/src/client/light/mod.rs
+++ b/client/service/src/client/light/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/>.
+
 //! Light client components.
 
 pub mod backend;
diff --git a/client/service/src/client/mod.rs b/client/service/src/client/mod.rs
index 52a67eb3e346a..7c96f61a7867a 100644
--- a/client/service/src/client/mod.rs
+++ b/client/service/src/client/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/>.
+
 //! Substrate Client and associated logic.
 //!
 //! The [`Client`] is one of the most important components of Substrate. It mainly comprises two
diff --git a/client/service/src/config.rs b/client/service/src/config.rs
index 7e4949e534875..cc9c742ed68db 100644
--- a/client/service/src/config.rs
+++ b/client/service/src/config.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/>.
+
 //! Service configuration.
 
 pub use sc_client_db::{Database, PruningMode, DatabaseSettingsSrc as DatabaseConfig};
diff --git a/client/service/src/error.rs b/client/service/src/error.rs
index 244fa553ff239..ffe1b39405501 100644
--- a/client/service/src/error.rs
+++ b/client/service/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/>.
+
 //! Errors that can occur during the service operation.
 
 use sc_network;
diff --git a/client/service/src/lib.rs b/client/service/src/lib.rs
index 9e97bb5756290..c902e6bb90737 100644
--- a/client/service/src/lib.rs
+++ b/client/service/src/lib.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/>.
+
 //! Substrate service. Starts a thread that spins up the network, client, and extrinsic pool.
 //! Manages communication between them.
 
diff --git a/client/service/src/metrics.rs b/client/service/src/metrics.rs
index 040dc8eb62547..f3463ffdbe616 100644
--- a/client/service/src/metrics.rs
+++ b/client/service/src/metrics.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 std::convert::TryFrom;
 
 use crate::NetworkStatus;
diff --git a/client/service/test/src/client/db.rs b/client/service/test/src/client/db.rs
index 19cf62b30d5f3..36d49732246e5 100644
--- a/client/service/test/src/client/db.rs
+++ b/client/service/test/src/client/db.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_core::offchain::{OffchainStorage, storage::InMemOffchainStorage};
 use std::sync::Arc;
 
@@ -53,4 +54,4 @@ fn in_memory_offchain_storage() {
 	assert!(!storage.compare_and_set(b"B", b"A", Some(b""), b"Y"));
 	assert!(storage.compare_and_set(b"B", b"A", None, b"X"));
 	assert_eq!(storage.get(b"B", b"A"), Some(b"X".to_vec()));
-}
\ No newline at end of file
+}
diff --git a/client/service/test/src/client/mod.rs b/client/service/test/src/client/mod.rs
index 1cfbe2930dc89..2124f0ced4122 100644
--- a/client/service/test/src/client/mod.rs
+++ b/client/service/test/src/client/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/>.
+
 use parity_scale_codec::{Encode, Decode, Joiner};
 use sc_executor::native_executor_instance;
 use sp_state_machine::{StateMachine, OverlayedChanges, ExecutionStrategy, InMemoryBackend};
diff --git a/client/service/test/src/lib.rs b/client/service/test/src/lib.rs
index a7e4b31ebb755..63c7e0795dc1a 100644
--- a/client/service/test/src/lib.rs
+++ b/client/service/test/src/lib.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/>.
+
 //! Service integration test utils.
 
 use std::iter;
diff --git a/client/state-db/src/lib.rs b/client/state-db/src/lib.rs
index 68c658beb6089..61470894e487e 100644
--- a/client/state-db/src/lib.rs
+++ b/client/state-db/src/lib.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/>.
+
 //! State database maintenance. Handles canonicalization and pruning in the database. The input to
 //! this module is a `ChangeSet` which is basically a list of key-value pairs (trie nodes) that
 //! were added or deleted during block execution.
diff --git a/client/state-db/src/noncanonical.rs b/client/state-db/src/noncanonical.rs
index 34e7a8725cd6b..d77f20c50d05f 100644
--- a/client/state-db/src/noncanonical.rs
+++ b/client/state-db/src/noncanonical.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/>.
+
 //! Canonicalization window.
 //! Maintains trees of block overlays and allows discarding trees/roots
 //! The overlays are added in `insert` and removed in `canonicalize`.
diff --git a/client/state-db/src/pruning.rs b/client/state-db/src/pruning.rs
index 743db9bc1f9ba..69b07c285fad8 100644
--- a/client/state-db/src/pruning.rs
+++ b/client/state-db/src/pruning.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/>.
+
 //! Pruning window.
 //!
 //! For each block we maintain a list of nodes pending deletion.
diff --git a/client/state-db/src/test.rs b/client/state-db/src/test.rs
index 17686031a73c2..11ce4ad822620 100644
--- a/client/state-db/src/test.rs
+++ b/client/state-db/src/test.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/>.
+
 //! Test utils
 
 use std::collections::HashMap;
diff --git a/client/telemetry/src/lib.rs b/client/telemetry/src/lib.rs
index 0752a3c53fc24..315bedbe5b6d9 100644
--- a/client/telemetry/src/lib.rs
+++ b/client/telemetry/src/lib.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/>.
+
 //! Telemetry utilities.
 //!
 //! Calling `init_telemetry` registers a global `slog` logger using `slog_scope::set_global_logger`.
diff --git a/client/telemetry/src/worker.rs b/client/telemetry/src/worker.rs
index b147313aee13c..68d4c4e20971b 100644
--- a/client/telemetry/src/worker.rs
+++ b/client/telemetry/src/worker.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/>.
+
 //! Contains the object that makes the telemetry work.
 //!
 //! # Usage
diff --git a/client/telemetry/src/worker/node.rs b/client/telemetry/src/worker/node.rs
index bdca054c233f1..6b1a0f62b129b 100644
--- a/client/telemetry/src/worker/node.rs
+++ b/client/telemetry/src/worker/node.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/>.
+
 //! Contains the `Node` struct, which handles communications with a single telemetry endpoint.
 
 use bytes::BytesMut;
diff --git a/client/transaction-pool/graph/benches/basics.rs b/client/transaction-pool/graph/benches/basics.rs
index 80d5ac838b181..ee92b60d548e6 100644
--- a/client/transaction-pool/graph/benches/basics.rs
+++ b/client/transaction-pool/graph/benches/basics.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 criterion::{criterion_group, criterion_main, Criterion};
 
 use futures::{future::{ready, Ready}, executor::block_on};
diff --git a/client/transaction-pool/graph/src/base_pool.rs b/client/transaction-pool/graph/src/base_pool.rs
index 2cb9a16126b35..0128e94675e23 100644
--- a/client/transaction-pool/graph/src/base_pool.rs
+++ b/client/transaction-pool/graph/src/base_pool.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 basic version of the dependency graph.
 //!
 //! For a more full-featured pool, have a look at the `pool` module.
diff --git a/client/transaction-pool/graph/src/error.rs b/client/transaction-pool/graph/src/error.rs
index b970ab6f455e5..392ddaa39be6f 100644
--- a/client/transaction-pool/graph/src/error.rs
+++ b/client/transaction-pool/graph/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/>.
+
 //! Transaction pool errors.
 
 use sp_runtime::transaction_validity::{
diff --git a/client/transaction-pool/graph/src/future.rs b/client/transaction-pool/graph/src/future.rs
index 76fa51a3adb7b..80e6825d4ff9d 100644
--- a/client/transaction-pool/graph/src/future.rs
+++ b/client/transaction-pool/graph/src/future.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 std::{
 	collections::{HashMap, HashSet},
 	fmt,
diff --git a/client/transaction-pool/graph/src/lib.rs b/client/transaction-pool/graph/src/lib.rs
index 6ef80e2eb2708..04e5d0d3fbe9f 100644
--- a/client/transaction-pool/graph/src/lib.rs
+++ b/client/transaction-pool/graph/src/lib.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/>.
+
 //! Generic Transaction Pool
 //!
 //! The pool is based on dependency graph between transactions
diff --git a/client/transaction-pool/graph/src/listener.rs b/client/transaction-pool/graph/src/listener.rs
index 0bee4384c2fd9..cccf542199a03 100644
--- a/client/transaction-pool/graph/src/listener.rs
+++ b/client/transaction-pool/graph/src/listener.rs
@@ -16,6 +16,7 @@
 
 // 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 std::{
 	collections::HashMap, hash,
 };
diff --git a/client/transaction-pool/graph/src/pool.rs b/client/transaction-pool/graph/src/pool.rs
index ffcdcdc06fce8..4f41e9110915e 100644
--- a/client/transaction-pool/graph/src/pool.rs
+++ b/client/transaction-pool/graph/src/pool.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 std::{
 	hash,
 	collections::HashMap,
diff --git a/client/transaction-pool/graph/src/ready.rs b/client/transaction-pool/graph/src/ready.rs
index dcd55f980f741..b5807ffce4480 100644
--- a/client/transaction-pool/graph/src/ready.rs
+++ b/client/transaction-pool/graph/src/ready.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 std::{
 	collections::{HashMap, HashSet, BTreeSet},
 	cmp,
diff --git a/client/transaction-pool/graph/src/rotator.rs b/client/transaction-pool/graph/src/rotator.rs
index a6bb855f23392..65e21d0d4b506 100644
--- a/client/transaction-pool/graph/src/rotator.rs
+++ b/client/transaction-pool/graph/src/rotator.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/>.
+
 //! Rotate extrinsic inside the pool.
 //!
 //! Keeps only recent extrinsic and discard the ones kept for a significant amount of time.
diff --git a/client/transaction-pool/graph/src/validated_pool.rs b/client/transaction-pool/graph/src/validated_pool.rs
index 66047ad50d7c0..7e8e91efe8f6b 100644
--- a/client/transaction-pool/graph/src/validated_pool.rs
+++ b/client/transaction-pool/graph/src/validated_pool.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 std::{
 	collections::{HashSet, HashMap},
 	hash,
diff --git a/client/transaction-pool/graph/src/watcher.rs b/client/transaction-pool/graph/src/watcher.rs
index 1c03c0e6a8920..9d9a91bb23f69 100644
--- a/client/transaction-pool/graph/src/watcher.rs
+++ b/client/transaction-pool/graph/src/watcher.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/>.
+
 //! Extrinsics status updates.
 
 use futures::Stream;
diff --git a/client/transaction-pool/src/api.rs b/client/transaction-pool/src/api.rs
index f2cd9c707fc47..725fb6ec4a8bf 100644
--- a/client/transaction-pool/src/api.rs
+++ b/client/transaction-pool/src/api.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/>.
+
 //! Chain api required for the transaction pool.
 
 use std::{marker::PhantomData, pin::Pin, sync::Arc};
diff --git a/client/transaction-pool/src/error.rs b/client/transaction-pool/src/error.rs
index fa05ca6a644e0..c0f795df1801a 100644
--- a/client/transaction-pool/src/error.rs
+++ b/client/transaction-pool/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/>.
+
 //! Transaction pool error.
 
 use sp_transaction_pool::error::Error as TxPoolError;
diff --git a/client/transaction-pool/src/lib.rs b/client/transaction-pool/src/lib.rs
index 8976003b7d4ba..05d7189a04a0d 100644
--- a/client/transaction-pool/src/lib.rs
+++ b/client/transaction-pool/src/lib.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/>.
+
 //! Substrate transaction pool implementation.
 
 #![recursion_limit="256"]
diff --git a/client/transaction-pool/src/metrics.rs b/client/transaction-pool/src/metrics.rs
index 68c5042f2d3ae..e377b2fe8294c 100644
--- a/client/transaction-pool/src/metrics.rs
+++ b/client/transaction-pool/src/metrics.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/>.
+
 //! Transaction pool Prometheus metrics.
 
 use std::sync::Arc;
diff --git a/client/transaction-pool/src/revalidation.rs b/client/transaction-pool/src/revalidation.rs
index 261ef5a1408a2..33f3a3da478f3 100644
--- a/client/transaction-pool/src/revalidation.rs
+++ b/client/transaction-pool/src/revalidation.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/>.
+
 //! Pool periodic revalidation.
 
 use std::{sync::Arc, pin::Pin, collections::{HashMap, HashSet, BTreeMap}};
diff --git a/client/transaction-pool/src/testing/mod.rs b/client/transaction-pool/src/testing/mod.rs
index c22d61491a992..350c4137c37b2 100644
--- a/client/transaction-pool/src/testing/mod.rs
+++ b/client/transaction-pool/src/testing/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/>.
+
 //! Tests for top-level transaction pool api
 
 mod pool;
diff --git a/client/transaction-pool/src/testing/pool.rs b/client/transaction-pool/src/testing/pool.rs
index 0b5ce8e90d7bb..4f30d5b6c3500 100644
--- a/client/transaction-pool/src/testing/pool.rs
+++ b/client/transaction-pool/src/testing/pool.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 crate::*;
 use sp_transaction_pool::TransactionStatus;
 use futures::executor::block_on;