f Slightly clarify docs

Author: tnull

src/payment/bolt11.rs

@@ -394,8 +394,8 @@ impl Bolt11Payment {
 	/// failed back, e.g., if the correct preimage can't be retrieved in time before the claim
 	/// deadline has been reached.
 	///
-	/// Will check that the payment is known before failing the payment, and will return an error
-	/// otherwise.
+	/// Will check that the payment is known and pending before failing the payment, and will
+	/// return an error otherwise.
 	///
 	/// [`receive_for_hash`]: Self::receive_for_hash
 	/// [`receive_variable_amount_for_hash`]: Self::receive_variable_amount_for_hash