f - Update stale docs

Author: jkczyz

lightning-invoice/src/payment.rs

@@ -14,11 +14,11 @@
 //! 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`].
 //!
-//! [`InvoicePayer`] caches each [`Invoice`] by its `payment_hash` so that it can retry the payment
-//! if it fails. It accomplishes this by implementing [`EventHandler`] which decorates a
-//! user-provided handler. It will intercept any [`Event::PaymentPathFailed`] events and retry the
-//! failed paths for a fixed number of total attempts or until retry is no longer possible. In such
-//! a situation, [`InvoicePayer`] will pass along the events to the user-provided handler.
+//! [`InvoicePayer`] is capable of retrying failed payments. It accomplishes this by implementing
+//! [`EventHandler`] which decorates a user-provided handler. It will intercept any
+//! [`Event::PaymentPathFailed`] events and retry the failed paths for a fixed number of total
+//! attempts or until retry is no longer possible. In such a situation, [`InvoicePayer`] will pass
+//! along the events to the user-provided handler.
 //!
 //! # Example
 //!