f - rephrase docs

Author: jkczyz

lightning/src/routing/network_graph.rs

@@ -162,7 +162,7 @@ pub enum NetworkUpdate {
 		/// The update to apply via [`NetworkGraph::update_channel`].
 		msg: ChannelUpdate,
 	},
-	/// An error indicating only that a channel has failed, which should be applied via
+	/// An error indicating that a channel failed to route a payment, which should be applied via
 	/// [`NetworkGraph::channel_failed`].
 	ChannelFailure {
 		/// The short channel id of the closed channel.
@@ -171,7 +171,7 @@ pub enum NetworkUpdate {
 		/// `channel_update` message is received.
 		is_permanent: bool,
 	},
-	/// An error indicating only that a node has failed, which should be applied via
+	/// An error indicating that a node failed to route a payment, which should be applied via
 	/// [`NetworkGraph::node_failed`].
 	NodeFailure {
 		/// The node id of the failed node.