Formatter: Add blank line before class/object declaration inside of declaration body

idea/src/org/jetbrains/kotlin/idea/formatter/kotlinSpacingRules.kt

@@ -100,9 +100,10 @@ fun createSpacingBuilder(settings: CodeStyleSettings): KotlinSpacingBuilder {
             between(ENUM_ENTRY, DECLARATIONS).blankLines(1)
 
             beforeInside(FUN, TokenSet.create(BODY, CLASS_BODY)).lineBreakInCode()
+            beforeInside(CLASS, TokenSet.create(BODY, CLASS_BODY)).lineBreakInCode()
+            beforeInside(OBJECT_DECLARATION, TokenSet.create(BODY, CLASS_BODY)).lineBreakInCode()
             before(PROPERTY).lineBreakInCode()
 
-
             after(DOC_COMMENT).lineBreakInCode()
 
             // =============== Spacing ================

idea/testData/formatter/ClassInBody.after.kt

@@ -0,0 +1,28 @@
+class A { // abc
+    class B
+}
+
+class A {
+    class B {}
+}
+
+class A {
+    class B {
+
+    }
+}
+
+fun foo() {
+    // abc
+    class B
+}
+
+fun foo() {
+    class B {}
+}
+
+fun foo() {
+    class B {
+
+    }
+}

idea/testData/formatter/ClassInBody.kt

@@ -0,0 +1,23 @@
+class A { // abc
+    class B
+}
+
+class A { class B {}
+}
+
+class A { class B {
+
+}
+}
+
+fun foo() { // abc
+    class B
+}
+
+fun foo() { class B {}
+}
+
+fun foo() { class B {
+
+}
+}

idea/testData/formatter/ObjectInBody.after.kt

@@ -0,0 +1,28 @@
+class A { // abc
+    object B
+}
+
+class A {
+    object B {}
+}
+
+class A {
+    object B {
+
+    }
+}
+
+fun foo() {
+    // abc
+    object B
+}
+
+fun foo() {
+    object B {}
+}
+
+fun foo() {
+    object B {
+
+    }
+}

idea/testData/formatter/ObjectInBody.kt

@@ -0,0 +1,23 @@
+class A { // abc
+    object B
+}
+
+class A { object  B {}
+}
+
+class A { object B {
+
+}
+}
+
+fun foo() { // abc
+    object B
+}
+
+fun foo() { object  B {}
+}
+
+fun foo() { object B {
+
+}
+}

idea/tests/org/jetbrains/kotlin/formatter/JetFormatterTestGenerated.java

@@ -97,6 +97,12 @@ public class JetFormatterTestGenerated extends AbstractJetFormatterTest {
             doTest(fileName);
         }
 
+        @TestMetadata("ClassInBody.after.kt")
+        public void testClassInBody() throws Exception {
+            String fileName = JetTestUtils.navigationMetadata("idea/testData/formatter/ClassInBody.after.kt");
+            doTest(fileName);
+        }
+
         @TestMetadata("ClassLineBreak.after.kt")
         public void testClassLineBreak() throws Exception {
             String fileName = JetTestUtils.navigationMetadata("idea/testData/formatter/ClassLineBreak.after.kt");
@@ -355,6 +361,12 @@ public class JetFormatterTestGenerated extends AbstractJetFormatterTest {
             doTest(fileName);
         }
 
+        @TestMetadata("ObjectInBody.after.kt")
+        public void testObjectInBody() throws Exception {
+            String fileName = JetTestUtils.navigationMetadata("idea/testData/formatter/ObjectInBody.after.kt");
+            doTest(fileName);
+        }
+
         @TestMetadata("ParameterDocComments.after.kt")
         public void testParameterDocComments() throws Exception {
             String fileName = JetTestUtils.navigationMetadata("idea/testData/formatter/ParameterDocComments.after.kt");