f - rephrase expect message

Author: jkczyz

lightning/src/ln/channel.rs

@@ -10729,7 +10729,7 @@ where
 		// by the funding inputs.
 		let adjusted_funding_contribution = if our_funding_contribution < SignedAmount::ZERO {
 			let adjusted_funding_contribution = our_funding_contribution
-				- fees.to_signed().expect("fees should never exceed splice-out value");
+				- fees.to_signed().expect("fees should never exceed Amount::MAX_MONEY");
 
 			// TODO(splicing): Check that channel balance does not go below the channel reserve
 			let _post_channel_balance = AddSigned::checked_add_signed(