New J2K: Move comments from primary constructor to init section

nj2k/src/org/jetbrains/kotlin/nj2k/conversions/PrimaryConstructorDetectConversion.kt

@@ -33,6 +33,10 @@ class PrimaryConstructorDetectConversion(private val context: ConversionContext)
         if (primaryConstructorCandidate.block.statements.isNotEmpty()) {
             val initDeclaration = JKKtInitDeclarationImpl(primaryConstructorCandidate.block)
                 .withNonCodeElementsFrom(primaryConstructorCandidate)
+            primaryConstructorCandidate.clearNonCodeElements()
+            for (modifierElement in primaryConstructorCandidate.modifierElements()) {
+                modifierElement.clearNonCodeElements()
+            }
             element.classBody.declarations =
                 element.classBody.declarations.replace(primaryConstructorCandidate, initDeclaration)
         } else {

nj2k/src/org/jetbrains/kotlin/nj2k/tree/tokens.kt

@@ -43,6 +43,10 @@ fun JKTreeElement.commentsFromInside(): List<JKCommentElement> {
 inline fun <reified T : JKNonCodeElementsListOwner> T.withNonCodeElementsFrom(other: JKNonCodeElementsListOwner): T =
     also { it.takeNonCodeElementsFrom(other) }
 
+inline fun JKNonCodeElementsListOwner.clearNonCodeElements() {
+    leftNonCodeElements = emptyList()
+    rightNonCodeElements = emptyList()
+}
 
 interface JKTokenElement : JKNonCodeElementsListOwner {
     val text: String