Update docs

Author: jurvis

lightning/src/util/events.rs

@@ -35,7 +35,6 @@ use prelude::*;
 use core::time::Duration;
 use core::ops::Deref;
 use sync::Arc;
-use io::Error;
 
 /// Some information provided on receipt of payment depends on whether the payment received is a
 /// spontaneous payment or a "conventional" lightning payment that's paying an invoice.
@@ -503,9 +502,9 @@ pub enum Event {
 		/// [`ChannelManager`]: crate::ln::channelmanager::ChannelManager
 		channel_type: ChannelTypeFeatures,
 	},
-	/// Indicates that a HTLC has failed to be processed and forwarded through us.
+	/// Indicates that a HTLC has failed to be processed and forwarded through us, or accepted by us
 	HTLCHandlingFailed {
-		/// The channel_id of the sender
+		/// Represents the id of the channel through which the HTLC was forwarded to us.
 		prev_channel_id: [u8; 32],
 		/// Destination of payment
 		destination: HTLCDestination