Formatter: fix line break between declarations with comment

#KT-12490 Fixed
#KT-35088 Fixed

idea/testData/refactoring/pushDown/k2k/pushClassMembersAndMakeAbstract.kt.after

@@ -1,8 +1,10 @@
 abstract class A {
     // INFO: {"checked": "true", "toAbstract": "true"}
     abstract val x: Int
+
     // INFO: {"checked": "true", "toAbstract": "true"}
     abstract val y: Int
+
     // INFO: {"checked": "true", "toAbstract": "true"}
     abstract val z: Int
 
@@ -14,10 +16,13 @@ abstract class A {
 abstract class B : A() {
     // INFO: {"checked": "true", "toAbstract": "true"}
     override val x = 1
+
     // INFO: {"checked": "true", "toAbstract": "true"}
     override val y: Int get() = 2
+
     // INFO: {"checked": "true", "toAbstract": "true"}
     override val z: Int by lazy { 3 }
+
     // INFO: {"checked": "true", "toAbstract": "true"}
     abstract val t: Int
 
@@ -41,14 +46,18 @@ abstract class B : A() {
 
 class C : A() {
     val t = 1
+
     // INFO: {"checked": "true", "toAbstract": "true"}
     override val x = 1
+
     // INFO: {"checked": "true", "toAbstract": "true"}
     override val y: Int get() = 2
+
     // INFO: {"checked": "true", "toAbstract": "true"}
     override val z: Int by lazy { 3 }
 
     fun bar(s: String) = s.length()
+
     // INFO: {"checked": "true", "toAbstract": "true"}
     override fun foo(n: Int): Boolean = n > 0