Add rustfmt::skip where needed

Author: tnull

lightning/src/ln/onion_utils.rs

@@ -797,6 +797,7 @@ impl_writeable_tlv_based_enum!(HTLCFailReasonRepr,
 ;);
 
 impl HTLCFailReason {
+	#[rustfmt::skip]
 	pub(super) fn reason(failure_code: u16, data: Vec<u8>) -> Self {
 		const BADONION: u16 = 0x8000;
 		const PERM: u16 = 0x4000;