preserve comments: invert if in case when else branch become empty

java/java-impl/src/com/intellij/codeInsight/intention/impl/InvertIfConditionAction.java

@@ -142,7 +142,7 @@ public class InvertIfConditionAction extends PsiElementBaseIntentionAction {
         elseBranch = Objects.requireNonNull(ifStatement.getElseBranch()).replace(elseBranch);
 
         if (emptyBlock(((PsiBlockStatement)elseBranch).getCodeBlock())) {
-          ifStatement.getElseBranch().delete();
+          new CommentTracker().deleteAndRestoreComments(ifStatement.getElseBranch());
         }
       }
     }

java/java-tests/testData/codeInsight/invertIfCondition/afterEmptyElseWithComments.java

@@ -0,0 +1,10 @@
+// "Invert 'if' condition" "true"
+class A {
+    public void foo() {
+        if (c) {
+        }
+        //c1
+
+        System.out.println();
+    }
+}

java/java-tests/testData/codeInsight/invertIfCondition/beforeEmptyElseWithComments.java

@@ -0,0 +1,9 @@
+// "Invert 'if' condition" "true"
+class A {
+    public void foo() {
+        <caret>if (!c) {
+            continue;
+        }//c1
+        System.out.println();
+    }
+}