f - Update some missed docs

Author: jkczyz

lightning-invoice/src/payment.rs

@@ -9,10 +9,11 @@
 
 //! A module for paying Lightning invoices and sending spontaneous payments.
 //!
-//! Defines an [`InvoicePayer`] utility for paying invoices, parameterized by [`Payer`] and
+//! Defines an [`InvoicePayer`] utility for sending payments, parameterized by [`Payer`] and
 //! [`Router`] traits. Implementations of [`Payer`] provide the payer's node id, channels, and means
 //! to send a payment over a [`Route`]. Implementations of [`Router`] find a [`Route`] between payer
-//! and payee using information provided by the payer and from the payee's [`Invoice`].
+//! and payee using information provided by the payer and from the payee's [`Invoice`], when
+//! applicable.
 //!
 //! [`InvoicePayer`] is capable of retrying failed payments. It accomplishes this by implementing
 //! [`EventHandler`] which decorates a user-provided handler. It will intercept any
@@ -134,7 +135,7 @@ use std::ops::Deref;
 use std::sync::Mutex;
 use std::time::{Duration, SystemTime};
 
-/// A utility for paying [`Invoice]`s.
+/// A utility for paying [`Invoice`]s and sending spontaneous payments.
 pub struct InvoicePayer<P: Deref, R, S: Deref, L: Deref, E>
 where
 	P::Target: Payer,