multi: fix spelling mistakes

chainntnfs/btcdnotify/btcd.go

@@ -909,7 +909,7 @@ func (b *BtcdNotifier) RegisterSpendNtfn(outpoint *wire.OutPoint,
 	// In order to ensure that we don't block the caller on what may be a
 	// long rescan, we'll launch a new goroutine to handle the async result
 	// of the rescan. We purposefully prevent from adding this goroutine to
-	// the WaitGroup as we cannnot wait for a quit signal due to the
+	// the WaitGroup as we cannot wait for a quit signal due to the
 	// asyncResult channel not being exposed.
 	//
 	// TODO(wilmer): add retry logic if rescan fails?

chainntnfs/txnotifier.go

@@ -207,7 +207,7 @@ func (r ConfRequest) MatchesTx(tx *wire.MsgTx) bool {
 }
 
 // ConfNtfn represents a notifier client's request to receive a notification
-// once the target transaction/ouput script gets sufficient confirmations. The
+// once the target transaction/output script gets sufficient confirmations. The
 // client is asynchronously notified via the ConfirmationEvent channels.
 type ConfNtfn struct {
 	// ConfID uniquely identifies the confirmation notification request for

chainntnfs/txnotifier_test.go

@@ -1076,7 +1076,7 @@ func TestTxNotifierCancelConf(t *testing.T) {
 		t.Fatalf("expected to receive confirmation notification")
 	}
 
-	// The second one, however, should not have. The event's Confrimed
+	// The second one, however, should not have. The event's Confirmed
 	// channel must have also been closed to indicate the caller that the
 	// TxNotifier can no longer fulfill their canceled request.
 	select {