fix typos

transport/internet/kcp/connection.go

@@ -366,7 +366,7 @@ func (c *Connection) waitForDataOutput() error {
 func (c *Connection) Write(b []byte) (int, error) {
 	// This involves multiple copies of the buffer. But we don't expect this method to be used often.
 	// Only wrapped connections such as TLS and WebSocket will call into this.
-	// TODO: improve effeciency.
+	// TODO: improve efficiency.
 	var mb buf.MultiBuffer
 	common.Must2(mb.Write(b))
 	if err := c.WriteMultiBuffer(mb); err != nil {

transport/internet/sockopt_linux_test.go

@@ -41,7 +41,7 @@ func TestSockOptMark(t *testing.T) {
 		m, err := syscall.GetsockoptInt(int(fd), syscall.SOL_SOCKET, syscall.SO_MARK)
 		common.Must(err)
 		if mark != m {
-			t.Fatal("unexpected conneciton mark", m, " want ", mark)
+			t.Fatal("unexpected connection mark", m, " want ", mark)
 		}
 	})
 	common.Must(err)