[TBS] build good on 1.22.0 + correc styles

Author: Antoine Riard

src/ln/channelmonitor.rs

@@ -289,9 +289,8 @@ impl ChannelMonitor {
 
 		let local_signed_commitment_tx = &self.current_local_signed_commitment_tx;
 		let remote_claimable_outpoints = &self.remote_claimable_outpoints;
-		self.payment_preimages.retain( | &k, _| 
-			{
-				for (htlc, _s1, _s2) in &local_signed_commitment_tx.as_ref().expect("Channel needs at least an initial commitment tx !").htlc_outputs {
+		self.payment_preimages.retain(|&k, _| {
+				for &(ref htlc, _s1, _s2) in &local_signed_commitment_tx.as_ref().expect("Channel needs at least an initial commitment tx !").htlc_outputs {
 					if k == htlc.payment_hash {
 						return true
 					}