IR text tests: Stable blank lines between declarations in class

Rework rendering of kt-like dump and signatures dump in order to avoid
unstable blank line between declarations of the same level:
1. No blank line for the first declaration inside the member scope of
the class.
2. Always a single blank line between each two subsequent declarations
inside the member scope of the class.

compiler/testData/ir/irText/classes/dataClasses/dataClassWithArrayMembers.sig.kt.txt

@@ -142,6 +142,7 @@ data class Test1 {
   //   Public signature: /Test1.<init>|-2901047261480922149[0]
   //   Public signature debug description: <init>(kotlin.Array<kotlin.String>;kotlin.CharArray;kotlin.BooleanArray;kotlin.ByteArray;kotlin.ShortArray;kotlin.IntArray;kotlin.LongArray;kotlin.FloatArray;kotlin.DoubleArray){}
   constructor(stringArray: Array<String>, charArray: CharArray, booleanArray: BooleanArray, byteArray: ByteArray, shortArray: ShortArray, intArray: IntArray, longArray: LongArray, floatArray: FloatArray, doubleArray: DoubleArray) /* primary */
+
   // CHECK JVM_IR:
   //   Mangled name: Test1#component1(){}kotlin.Array<kotlin.String>
   //   Public signature: /Test1.component1|2673462985803256369[0]
@@ -298,6 +299,7 @@ data class Test2<T : Any?> {
   //   Public signature: /Test2.<init>|-6569388914691766420[0]
   //   Public signature debug description: <init>(kotlin.Array<1:0>){}
   constructor(genericArray: Array<T>) /* primary */
+
   // CHECK JVM_IR:
   //   Mangled name: Test2#component1(){}kotlin.Array<1:0>
   //   Public signature: /Test2.component1|-8550302254215159930[0]
@@ -374,6 +376,7 @@ data class Test3 {
   //   Public signature: /Test3.<init>|2034455610636948474[0]
   //   Public signature debug description: <init>(kotlin.Array<kotlin.Any>?){}
   constructor(anyArrayN: Array<Any>?) /* primary */
+
   // CHECK JVM_IR:
   //   Mangled name: Test3#component1(){}kotlin.Array<kotlin.Any>?
   //   Public signature: /Test3.component1|3443609172722853741[0]

compiler/testData/ir/irText/classes/dataClasses/dataClasses.sig.kt.txt

@@ -52,6 +52,7 @@ data class Test1 {
   //   Public signature: /Test1.<init>|3237794121889594884[0]
   //   Public signature debug description: <init>(kotlin.Int;kotlin.String;kotlin.Any){}
   constructor(x: Int, y: String, z: Any) /* primary */
+
   // CHECK JVM_IR:
   //   Mangled name: Test1#component1(){}kotlin.Int
   //   Public signature: /Test1.component1|-8217597213800111288[0]
@@ -148,6 +149,7 @@ data class Test2 {
   //   Public signature: /Test2.<init>|-8205545948568413246[0]
   //   Public signature debug description: <init>(kotlin.Any?){}
   constructor(x: Any?) /* primary */
+
   // CHECK JVM_IR:
   //   Mangled name: Test2#component1(){}kotlin.Any?
   //   Public signature: /Test2.component1|-9062417290864755441[0]
@@ -269,6 +271,7 @@ data class Test3 {
   //   Public signature: /Test3.<init>|8878758829470622568[0]
   //   Public signature debug description: <init>(kotlin.Double;kotlin.Double?;kotlin.Float;kotlin.Float?){}
   constructor(d: Double, dn: Double?, f: Float, df: Float?) /* primary */
+
   // CHECK JVM_IR:
   //   Mangled name: Test3#component1(){}kotlin.Double
   //   Public signature: /Test3.component1|2948120330742694173[0]

compiler/testData/ir/irText/classes/dataClasses/dataClassesGeneric.sig.kt.txt

@@ -22,6 +22,7 @@ data class Test1<T : Any?> {
   //   Public signature: /Test1.<init>|-8731461708390519279[0]
   //   Public signature debug description: <init>(1:0){}
   constructor(x: T) /* primary */
+
   // CHECK JVM_IR:
   //   Mangled name: Test1#component1(){}1:0
   //   Public signature: /Test1.component1|2393470133763651536[0]
@@ -98,6 +99,7 @@ data class Test2<T : Number> {
   //   Public signature: /Test2.<init>|-8731461708390519279[0]
   //   Public signature debug description: <init>(1:0){}
   constructor(x: T) /* primary */
+
   // CHECK JVM_IR:
   //   Mangled name: Test2#component1(){}1:0
   //   Public signature: /Test2.component1|2393470133763651536[0]
@@ -174,6 +176,7 @@ data class Test3<T : Any?> {
   //   Public signature: /Test3.<init>|-6703374673612964420[0]
   //   Public signature debug description: <init>(kotlin.collections.List<1:0>){}
   constructor(x: List<T>) /* primary */
+
   // CHECK JVM_IR:
   //   Mangled name: Test3#component1(){}kotlin.collections.List<1:0>
   //   Public signature: /Test3.component1|-4141154284195946749[0]
@@ -250,6 +253,7 @@ data class Test4 {
   //   Public signature: /Test4.<init>|-9211757031347255021[0]
   //   Public signature debug description: <init>(kotlin.collections.List<kotlin.String>){}
   constructor(x: List<String>) /* primary */
+
   // CHECK JVM_IR:
   //   Mangled name: Test4#component1(){}kotlin.collections.List<kotlin.String>
   //   Public signature: /Test4.component1|-4918334505452908017[0]

compiler/testData/ir/irText/classes/dataClasses/dataObject.sig.kt.txt

@@ -7,6 +7,7 @@ data object DataObject {
   //   Public signature: /DataObject.<init>|-5645683436151566731[0]
   //   Public signature debug description: <init>(){}
   private constructor() /* primary */
+
   // CHECK JVM_IR:
   //   Mangled name: DataObject#equals(kotlin.Any?){}kotlin.Boolean
   //   Public signature: /DataObject.equals|722809408929142791[0]

compiler/testData/ir/irText/classes/dataClasses/delegationInSealed.sig.kt.txt

@@ -26,6 +26,7 @@ sealed class A : CharSequence {
     //   Public signature: /A.B.<init>|2804354480087813081[0]
     //   Public signature debug description: <init>(kotlin.CharSequence){}
     constructor(c: CharSequence) /* primary */
+
     // CHECK JVM_IR:
     //   Mangled name: A.B#get(kotlin.Int){}kotlin.Char
     //   Public signature: /A.B.get|6519934306502810002[0]

compiler/testData/ir/irText/classes/dataClasses/kt31649.sig.kt.txt

@@ -22,6 +22,7 @@ data class TestData {
   //   Public signature: /TestData.<init>|-7885966204384349687[0]
   //   Public signature debug description: <init>(kotlin.Nothing?){}
   constructor(nn: Nothing?) /* primary */
+
   // CHECK JVM_IR:
   //   Mangled name: TestData#component1(){}kotlin.Nothing?
   //   Public signature: /TestData.component1|137173073680766068[0]
@@ -98,6 +99,7 @@ value class TestInline {
   //   Public signature: /TestInline.<init>|-7885966204384349687[0]
   //   Public signature debug description: <init>(kotlin.Nothing?){}
   constructor(nn: Nothing?) /* primary */
+
   // CHECK JVM_IR:
   //   Mangled name: TestInline#equals(kotlin.Any?){}kotlin.Boolean
   //   Public signature: /TestInline.equals|722809408929142791[0]

compiler/testData/ir/irText/classes/dataClasses/kt49936.sig.kt.txt

@@ -22,6 +22,7 @@ data class A {
   //   Public signature: /A.<init>|-5182794243525578284[0]
   //   Public signature debug description: <init>(kotlin.Int){}
   constructor(x: Int) /* primary */
+
   // CHECK JVM_IR:
   //   Mangled name: A#component1(){}kotlin.Int
   //   Public signature: /A.component1|-8217597213800111288[0]

compiler/testData/ir/irText/classes/dataClasses/lambdaInDataClassDefaultParameter.sig.kt.txt

@@ -22,6 +22,7 @@ data class A {
   //   Public signature: /A.<init>|-2423641970729475329[0]
   //   Public signature debug description: <init>(kotlin.Function2<A,kotlin.String,kotlin.Unit>){}
   constructor(runA: @ExtensionFunctionType Function2<A, String, Unit>) /* primary */
+
   // CHECK JVM_IR:
   //   Mangled name: A#component1(){}kotlin.Function2<A,kotlin.String,kotlin.Unit>
   //   Public signature: /A.component1|793860828130635274[0]
@@ -98,6 +99,7 @@ data class B {
   //   Public signature: /B.<init>|4518179880532599055[0]
   //   Public signature debug description: <init>(kotlin.Any){}
   constructor(x: Any) /* primary */
+
   // CHECK JVM_IR:
   //   Mangled name: B#component1(){}kotlin.Any
   //   Public signature: /B.component1|2325042746135573536[0]

compiler/testData/ir/irText/classes/dataClasses/openDataClass.sig.kt.txt

@@ -37,6 +37,7 @@ open data class ValidatedProperties {
   //   Public signature: /ValidatedProperties.<init>|9140439783797628932[0]
   //   Public signature debug description: <init>(kotlin.String;kotlin.String){}
   constructor(test1: String, test2: String) /* primary */
+
   // CHECK JVM_IR:
   //   Mangled name: ValidatedProperties#component1(){}kotlin.String
   //   Public signature: /ValidatedProperties.component1|-7481405593404337796[0]