f clarify comment

Author: TheBlueMatt

lightning/src/chain/channelmonitor.rs

@@ -361,9 +361,9 @@ enum OnchainEvent {
 	HTLCUpdate {
 		source: HTLCSource,
 		payment_hash: PaymentHash,
-		/// If the HTLC was claimed by an HTLC-Success or HTLC-Timeout transaction (ie when the
-		/// HTLC exists on chain), this is the amount of the output of that transaction (ie
-		/// `htlc_value_satoshis` minus fees).
+		/// If the HTLC was claimed by an HTLC-Timeout transaction (ie when the HTLC exists on
+		/// chain), this is the amount of the output of that transaction (ie `htlc_value_satoshis`
+		/// minus fees).
 		onchain_value_satoshis: Option<u64>,
 		htlc_value_satoshis: Option<u64>,
 		/// None in the second case, above, ie when there is no relevant output in the commitment