fixup: Add TxBuilder::get_builder_stats

clarify comments

Author: tankyleo

lightning/src/sign/tx_builder.rs

@@ -239,7 +239,7 @@ impl TxBuilder for SpecTxBuilder {
 		// Increment the feerate by a buffer to calculate dust exposure
 		let dust_buffer_feerate = get_dust_buffer_feerate(feerate_per_kw);
 
-		// Calculate dust exposure on holder's commitment transaction
+		// Calculate fees and dust exposure on holder's commitment transaction
 		let on_holder_htlc_count = htlcs
 			.iter()
 			.filter(|htlc| {
@@ -255,7 +255,7 @@ impl TxBuilder for SpecTxBuilder {
 			&htlcs,
 		);
 
-		// Calculate dust exposure on counterparty's commitment transaction
+		// Calculate fees and dust exposure on counterparty's commitment transaction
 		let on_counterparty_htlc_count = htlcs
 			.iter()
 			.filter(|htlc| {