change signature: do not multiple javadocs (IDEA-94465)

java/java-tests/testData/refactoring/changeSignature/ParamJavadoc2.java

@@ -0,0 +1,12 @@
+class X {
+
+    /**
+     * Has a method called {@link #mymethod(boolean)}.
+     */
+    public class TestRefactorLink {
+      /**
+       * @param a aparam
+       */
+        public void <caret>mymethod(boolean a) { }
+    }
+}