golint fixes.

groups.go

@@ -146,7 +146,10 @@ func quitGroup(src string, hexid string) error {
 	return saveGroup(hexid)
 }
 
+// GroupUpdateFlag signals that this message updates the group membership or name.
 var GroupUpdateFlag uint32 = 1
+
+// GroupLeavelag signals that this message is a group leave message
 var GroupLeaveFlag uint32 = 2
 
 // handleGroups is the main entry point for handling the group metadata on messages.

textsecure.go

@@ -340,6 +340,7 @@ func handleMessage(src string, timestamp uint64, b []byte, legacy bool) error {
 	return handleSyncMessage(src, timestamp, content.GetSyncMessage())
 }
 
+// EndSessionFlag signals that this message resets the session
 var EndSessionFlag uint32 = 1
 
 func handleFlags(src string, dm *textsecure.DataMessage) (uint32, error) {

websocket.go

@@ -218,7 +218,7 @@ func StartListening() error {
 
 // ErrNotListening is returned when trying to stop listening when there's no
 // valid listening connection set up
-var ErrNotListening = errors.New("there is no listening connection to stop.")
+var ErrNotListening = errors.New("there is no listening connection to stop")
 
 // StopListening disables the receiving of messages.
 func StopListening() error {