feat: use DEFAULT_VALUE instead of GITHUB_SOURCE

Author: javier-godoy

src/main/java/com/flowingcode/vaadin/addons/demo/DemoSource.java

@@ -43,6 +43,8 @@
 @Target(ElementType.TYPE)
 public @interface DemoSource {
 
+  /** @deprecated. Use {@link #DEFAULT_VALUE} */
+  @Deprecated
   static final String GITHUB_SOURCE = "__GITHUB__";
 
   static final String DEFAULT_VALUE = "__DEFAULT__";
@@ -52,7 +54,7 @@
    * <p>
    * It is an error if both {@code value} and {@link #clazz()} are specified.
    */
-  String value() default GITHUB_SOURCE;
+  String value() default DEFAULT_VALUE;
 
   /**
    * The class to display, if different from the annotated class.

src/main/java/com/flowingcode/vaadin/addons/demo/TabbedDemo.java

@@ -235,7 +235,7 @@ public void showRouterLayoutContent(HasElement content) {
   private Optional<SourceCodeTab> createSourceCodeTab(Class<?> annotatedClass, DemoSource annotation) {
     String demoFile;
     String url = annotation.value();
-    if (url.equals(DemoSource.GITHUB_SOURCE)) {
+    if (url.equals(DemoSource.GITHUB_SOURCE) || url.equals(DemoSource.DEFAULT_VALUE)) {
       String className;
       if (annotation.clazz() == DemoSource.class) {
         className = annotatedClass.getName().replace('.', '/');