Fix trailing whitespaces in documentation comments.

src/main/java/cool/mqtt/hooks/MqttConnectOptions.java

@@ -3,7 +3,7 @@
 /**
  * A wrapper of the connection parameters actually used by the MQTT.Cool server while
  * establishing the <i>end-to-end</i> connection between the client and the target MQTT broker.
- * 
+ *
  * <p>The client may specify the following options on its behalf:
  * <ul>
  * <li>{@code username} and {@code password} used for authenticating the client: if provided, they
@@ -21,44 +21,43 @@ public interface MqttConnectOptions {
 
   /**
    * Gets the {@code username} to be used for authenticating with the target MQTT broker.
-   * 
+   *
    * @return the {@code username}, or {@code null} if no credential is provided
    */
   String getUsername();
 
   /**
    * Gets the {@code password} to be used for authenticating with the target MQTT broker.
-   * 
+   *
    * @return the {@code password}, or {@code null} if no credential is provided
    */
   String getPassword();
 
   /**
    * Gets the connection timeout expressed in seconds.
-   * 
+   *
    * @return the connection timeout expressed in seconds
    */
   int getConnectionTimeout();
 
   /**
    * Gets the keep alive interval expressed in seconds.
-   * 
+   *
    * @return the keep alive interval expressed in seconds
    */
   int getKeepAlive();
 
   /**
    * Gets the {@code Will Message} to be stored by the MQTT broker.
-   * 
-   * @return the {@code Will Message} to be stored by the MQTT broker if any, otherwise {@code null}
+   *
+   * @return the {@code Will Message} to be stored by the MQTT broker if any, or {@code null}
    */
   MqttMessage getWillMessage();
 
   /**
    * Gets the <i>clean session</i> flag specified by the client on connection establishment.
-   * 
-   * @return {@code true} if the client does not want to make the Session persistent, {@code false}
-   *         otherwise
+   *
+   * @return {@code true} if the client does not want to make the Session persistent
    */
   boolean isCleanSession();