fix(JavaDoc): Collapsed markdown comments with wrong suffixes

Not perfect at all, it should be able to rely on the commenter API instead.

GitOrigin-RevId: f41d181e9f27905bca1156912b7850f5a96ba943

java/java-tests/testData/codeInsight/folding/JavadocMarkdownComments.java

@@ -0,0 +1,71 @@
+<fold text='/// outer class javadoc ...'>/// outer class javadoc
+ /// javadoc body</fold>
+
+class Test {
+
+  <fold text='/// method javadoc ...'>/// method javadoc
+   /// javadoc body
+   ///
+   /// @param i</fold>
+
+  void foo(int i) <fold text='{...}'>{
+    <fold text='/// method var javadoc ...'>/// method var javadoc
+     /// javadoc body</fold>
+
+    int j = i;
+  }</fold>
+
+  <fold text='/// first line ...'>/// first line
+   /// second line</fold>
+
+  void illFormedJavaDocMultilines() <fold text='{}'>{
+  }</fold>
+
+  <fold text='/// first line ...'>/// first line
+   ///
+   ///</fold>
+
+  void javaDocWithTextOnlyOnFirstLine() <fold text='{}'>{
+
+  }</fold>
+
+  <fold text='/// second line ...'>/// second line
+   ///</fold>
+
+  void javaDocWithTextOnlyOnSecondLine() <fold text='{}'>{
+
+  }</fold>
+
+  <fold text='///  '>/// </fold>
+
+  void emptyJavadoc() <fold text='{}'>{
+
+  }</fold>
+
+  <fold text='/// dangling javadoc ...'>/// dangling javadoc
+   /// javadoc body</fold>
+
+
+  <fold text='/// inner class javadoc ...'>/// inner class javadoc
+   /// javadoc body</fold>
+
+  class Inner <fold text='{...}'>{
+
+    <fold text='/// javadoc for method in inner class ...'>/// javadoc for method in inner class
+     /// javadoc body</fold>
+
+    void foo() <fold text='{...}'>{
+      <fold text='/// javadoc for class in method ...'>/// javadoc for class in method
+       /// javadoc body</fold>
+
+      class MethodInner <fold text='{...}'>{
+
+        <fold text='/// javadoc for method inside class defined in method ...'>/// javadoc for method inside class defined in method
+         /// javadoc body</fold>
+
+        void bar() <fold text='{}'>{
+        }</fold>
+      }</fold>
+    }</fold>
+  }</fold>
+}