f - Update last_hops description in get_route docs

Author: jkczyz

lightning/src/routing/router.rs

@@ -333,8 +333,8 @@ fn compute_fees(amount_msat: u64, channel_fees: RoutingFees) -> Option<u64> {
 /// If the payee provided features in their invoice, they should be provided via payee_features.
 /// Without this, MPP will only be used if the payee's features are available in the network graph.
 ///
-/// Extra routing hops between known nodes and the target will be used if they are included in
-/// last_hops.
+/// Private routing paths between a public node and the target may be included in `last_hops`.
+/// Currently, only the last hop in each path is considered.
 ///
 /// If some channels aren't announced, it may be useful to fill in a first_hops with the
 /// results from a local ChannelManager::list_usable_channels() call. If it is filled in, our