actualized 'Folding Test' page

test data is updated with a new folding

tutorials/writing_tests_for_plugins/folding_test.md

@@ -14,8 +14,8 @@ Create a file *FoldingTestData.java*.
 
 ```java
 public class Test {
-    public static void main(String[] args) <fold text='{...}'>{
-        System.out.println("<fold text='http://en.wikipedia.org/'>simple:website</fold>");
+    public static void main(String[] args)<fold text=' { '> {
+        </fold>System.out.println("<fold text='http://en.wikipedia.org/'>simple:website</fold>");<fold text=' }'>
     }</fold>
 }
 ```