Formatter: fix line break between declarations with comment

#KT-12490 Fixed
#KT-35088 Fixed

idea/testData/formatter/EmptyLineBetweenEnumEntries.kt

@@ -25,6 +25,7 @@ enum class E7 {
 }
 
 enum class E8 {
+    // test
     A, // A
     B  // B
 }