f mention fees in test

lightning/src/ln/shutdown_tests.rs

@@ -1217,11 +1217,12 @@ fn simple_target_feerate_shutdown() {
 }
 
 fn do_outbound_update_no_early_closing_signed(use_htlc: bool) {
-	// Previously, if we have a pending inbound HTLC on a channel which has initiated shutdown,
-	// we'd send our initial closing_signed immediately after receiving the peer's last RAA to
-	// remove the HTLC, but before receiving their final commitment_signed for a commitment without
-	// the HTLC. This caused at least LDK peers to force-close as we initiated closing_signed prior
-	// to the channel actually being fully empty of HTLCs.
+	// Previously, if we have a pending inbound HTLC (or fee update) on a channel which has
+	// initiated shutdown, we'd send our initial closing_signed immediately after receiving the
+	// peer's last RAA to remove the HTLC/fee update, but before receiving their final
+	// commitment_signed for a commitment without the HTLC/with the new fee. This caused at least
+	// LDK peers to force-close as we initiated closing_signed prior to the channel actually being
+	// fully empty of pending updates/HTLCs.
 	let chanmon_cfgs = create_chanmon_cfgs(2);
 	let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
 	let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);