Improve javadoc for some addons (#15701)

Signed-off-by: Holger Friedrich <mail@holger-friedrich.de>

bundles/org.openhab.binding.rfxcom/src/main/java/org/openhab/binding/rfxcom/internal/messages/RFXComLighting4Message.java

@@ -39,6 +39,8 @@ import org.openhab.core.types.Type;
  *
  * a Lighting4 Base command is composed of 24 bit DATA plus PULSE information
  *
+ * <p>
+ * {@code
  * DATA:
  * Code = 014554
  * S1- S24 = <0000 0001 0100 0101 0101> <0100>
@@ -46,16 +48,22 @@ import org.openhab.core.types.Type;
  *
  * PULSE:
  * default 350
- *
+ * }
+ * 
  * Tested on a PT2262 remote PlugIn module
  *
+ * <p>
  * Example:
  *
+ * <pre>
+ * {@code
  * Switch TESTout "TestOut" (All) {rfxcom=">83205.350:LIGHTING4.PT2262:Command"}
  * (SendCommand DeviceID(int).Pulse(int):LIGHTING4.Subtype:Command )
  *
  * Switch TESTin "TestIn" (All) {rfxcom="<83205:Command"}
  * (ReceiveCommand ON/OFF Command )
+ * }
+ * </pre>
  *
  * @author Alessandro Ballini (ITA) - Initial contribution
  * @author Pauli Anttila - Migrated to OH2

bundles/org.openhab.binding.rfxcom/src/main/java/org/openhab/binding/rfxcom/internal/messages/RFXComThermostat3Message.java

@@ -41,7 +41,7 @@ import org.openhab.core.types.UnDefType;
  *
  * @author Sander Biesenbeek - Initial contribution
  * @author Ruud Beukema - Initial contribution (parallel development)
- * @author Martin van Wingerden - Joined contribution of Sander & Ruud
+ * @author Martin van Wingerden - Joined contribution of Sander and Ruud
  */
 public class RFXComThermostat3Message extends RFXComDeviceMessageImpl<RFXComThermostat3Message.SubType> {
     public enum SubType implements ByteEnumWrapper {