diff --git a/substrate/client/finality-grandpa/src/authorities.rs b/substrate/client/finality-grandpa/src/authorities.rs
index ececbf1d7c701bea44fb8a1f571198dbd174a3d5..a04be72f9d31ebb5eef1741784e3e34a960c48e8 100644
--- a/substrate/client/finality-grandpa/src/authorities.rs
+++ b/substrate/client/finality-grandpa/src/authorities.rs
@@ -295,8 +295,7 @@ where
 
 		debug!(
 			target: "afg",
-			"Inserting potential standard set change signaled at block {:?} (delayed by {:?}
-			blocks).",
+			"Inserting potential standard set change signaled at block {:?} (delayed by {:?} blocks).",
 			(&number, &hash),
 			pending.delay,
 		);
@@ -310,8 +309,8 @@ where
 
 		debug!(
 			target: "afg",
-			"There are now {} alternatives for the next pending standard change (roots), and a
-			total of {} pending standard changes (across all forks).",
+			"There are now {} alternatives for the next pending standard change (roots), and a \
+			 total of {} pending standard changes (across all forks).",
 			self.pending_standard_changes.roots().count(),
 			self.pending_standard_changes.iter().count(),
 		);
diff --git a/substrate/client/finality-grandpa/src/import.rs b/substrate/client/finality-grandpa/src/import.rs
index c287cc0b3b8962ab1cb8c475e69f0cc8a5352306..ebb26a28c34855e7c59bf1b78b78b0fdbb1939a9 100644
--- a/substrate/client/finality-grandpa/src/import.rs
+++ b/substrate/client/finality-grandpa/src/import.rs
@@ -372,9 +372,8 @@ where
 						self.inner.header(BlockId::Number(canon_number))
 							.map_err(|e| ConsensusError::ClientImport(e.to_string()))?
 							.expect(
-								"the given block number is less or equal than the current best
-								finalized number; current best finalized number must exist in
-								chain; qed."
+								"the given block number is less or equal than the current best finalized number; \
+								 current best finalized number must exist in chain; qed."
 							)
 							.hash();
 
diff --git a/substrate/client/finality-grandpa/src/lib.rs b/substrate/client/finality-grandpa/src/lib.rs
index a133319fdbef43db59888830a1177971c4422bf0..6c3f0f6af37a868a73dca55eff773fbafbe66ab1 100644
--- a/substrate/client/finality-grandpa/src/lib.rs
+++ b/substrate/client/finality-grandpa/src/lib.rs
@@ -778,7 +778,7 @@ where
 
 				let authorities = serde_json::to_string(&authorities).expect(
 					"authorities is always at least an empty vector; \
-					elements are always of type string",
+					 elements are always of type string",
 				);
 
 				telemetry!(
@@ -945,7 +945,7 @@ where
 			.collect::<Vec<_>>();
 
 		let authorities = serde_json::to_string(&authorities).expect(
-			"authorities is always at least an empty vector; elements are always of type string",
+			"authorities is always at least an empty vector; elements are always of type string; qed.",
 		);
 
 		telemetry!(
@@ -1037,9 +1037,9 @@ where
 				let voters = Arc::new(VoterSet::new(new.authorities.into_iter())
 					.expect(
 						"new authorities come from pending change; \
-						pending change comes from `AuthoritySet`; \
-						`AuthoritySet` validates authorities is non-empty and weights are non-zero; \
-						qed."
+						 pending change comes from `AuthoritySet`; \
+						 `AuthoritySet` validates authorities is non-empty and weights are non-zero; \
+						 qed."
 					)
 				);