Improve Javadoc

feature-toggle/src/main/java/com/iluwatar/featuretoggle/App.java

@@ -67,7 +67,7 @@ public class App {
    *  @see UserGroup
    *  @see Service
    *  @see PropertiesFeatureToggleVersion
-   *  @see com.iluwatar.featuretoggle.pattern.tieredversion.TieredFeatureToggleVersion;
+   *  @see com.iluwatar.featuretoggle.pattern.tieredversion.TieredFeatureToggleVersion
    */
   public static void main(String[] args) {
 

feature-toggle/src/main/java/com/iluwatar/featuretoggle/pattern/Service.java

@@ -47,7 +47,7 @@ public interface Service {
   /**
    * Returns if the welcome message to be displayed will be the enhanced version.
    *
-   * @return Boolean {@value true} if enhanced.
+   * @return Boolean {@code true} if enhanced.
    */
   boolean isEnhanced();
 

feature-toggle/src/main/java/com/iluwatar/featuretoggle/pattern/propertiesversion/PropertiesFeatureToggleVersion.java

@@ -91,7 +91,7 @@ public class PropertiesFeatureToggleVersion implements Service {
    * see the value of the boolean that was set in the constructor
    * {@link PropertiesFeatureToggleVersion#PropertiesFeatureToggleVersion(Properties)}
    *
-   * @return Boolean value {@value true} if enhanced.
+   * @return Boolean value {@code true} if enhanced.
    */
   @Override
   public boolean isEnhanced() {

feature-toggle/src/main/java/com/iluwatar/featuretoggle/pattern/tieredversion/TieredFeatureToggleVersion.java

@@ -65,7 +65,7 @@ public class TieredFeatureToggleVersion implements Service {
    * is driven by the user group. This method is a little redundant. However can be used to show that there is an
    * enhanced version available.
    *
-   * @return Boolean value {@value true} if enhanced.
+   * @return Boolean value {@code true} if enhanced.
    */
   @Override
   public boolean isEnhanced() {