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/declarations/contextReceivers/arrayAccessCompositeOperators.sig.kt.txt

@@ -47,6 +47,7 @@ data class MyContainer {
   //   Public signature: /MyContainer.<init>|-5182794243525578284[0]
   //   Public signature debug description: <init>(kotlin.Int){}
   constructor(i: Int) /* primary */
+
   // CHECK JVM_IR:
   //   Mangled name: MyContainer#component1(){}kotlin.Int
   //   Public signature: /MyContainer.component1|-8217597213800111288[0]

compiler/testData/ir/irText/declarations/contextReceivers/arrayAccessOperators.sig.kt.txt

@@ -27,6 +27,7 @@ data class MyContainer {
   //   Public signature: /MyContainer.<init>|1280618353163213788[0]
   //   Public signature debug description: <init>(kotlin.String){}
   constructor(s: String) /* primary */
+
   // CHECK JVM_IR:
   //   Mangled name: MyContainer#component1(){}kotlin.String
   //   Public signature: /MyContainer.component1|-7481405593404337796[0]

compiler/testData/ir/irText/declarations/contextReceivers/compoundAssignmentOperators.sig.kt.txt

@@ -47,6 +47,7 @@ data class Result {
   //   Public signature: /Result.<init>|-5182794243525578284[0]
   //   Public signature debug description: <init>(kotlin.Int){}
   constructor(i: Int) /* primary */
+
   // CHECK JVM_IR:
   //   Mangled name: Result#component1(){}kotlin.Int
   //   Public signature: /Result.component1|-8217597213800111288[0]

compiler/testData/ir/irText/declarations/contextReceivers/fromKEEP/canvas.sig.kt.txt

@@ -24,7 +24,6 @@ class Circle : Shape {
 //   Mangled name: Canvas
 //   Public signature: /Canvas|null[0]
 interface Canvas {
-
   // CHECK:
   //   Mangled name: Canvas{}suffix
   //   Public signature: /Canvas.suffix|-3301965527200666288[0]
@@ -46,7 +45,6 @@ interface Canvas {
 //   Mangled name: Shape
 //   Public signature: /Shape|null[0]
 interface Shape {
-
   // CHECK JVM_IR:
   //   Mangled name: Shape#draw!Canvas(){}kotlin.String
   //   Public signature: /Shape.draw|-6733499063990640842[0]

compiler/testData/ir/irText/declarations/contextReceivers/fromKEEP/compareTo.sig.kt.txt

@@ -37,6 +37,7 @@ data class Pair<A : Any?, B : Any?> {
   //   Public signature: /Pair.<init>|3086114026882374588[0]
   //   Public signature debug description: <init>(1:0;1:1){}
   constructor(first: A, second: B) /* primary */
+
   // CHECK JVM_IR:
   //   Mangled name: Pair#component1(){}1:0
   //   Public signature: /Pair.component1|2393470133763651536[0]

compiler/testData/ir/irText/declarations/contextReceivers/fromKEEP/monoidSum.sig.kt.txt

@@ -33,7 +33,6 @@ interface Monoid<T : Any?> : Semigroup<T> {
 //   Mangled name: Semigroup
 //   Public signature: /Semigroup|null[0]
 interface Semigroup<T : Any?> {
-
   // CHECK JVM_IR:
   //   Mangled name: Semigroup#combine@1:0(1:0){}1:0
   //   Public signature: /Semigroup.combine|-3517256775590682507[0]

compiler/testData/ir/irText/declarations/contextReceivers/iteratorOperator.sig.kt.txt

@@ -27,6 +27,7 @@ data class Counter {
   //   Public signature: /Counter.<init>|-5182794243525578284[0]
   //   Public signature debug description: <init>(kotlin.Int){}
   constructor(i: Int) /* primary */
+
   // CHECK JVM_IR:
   //   Mangled name: Counter#component1(){}kotlin.Int
   //   Public signature: /Counter.component1|-8217597213800111288[0]
@@ -103,6 +104,7 @@ data class CounterConfig {
   //   Public signature: /CounterConfig.<init>|-5182794243525578284[0]
   //   Public signature debug description: <init>(kotlin.Int){}
   constructor(max: Int) /* primary */
+
   // CHECK JVM_IR:
   //   Mangled name: CounterConfig#component1(){}kotlin.Int
   //   Public signature: /CounterConfig.component1|-8217597213800111288[0]

compiler/testData/ir/irText/declarations/contextReceivers/lazy.kt.txt

@@ -1,5 +1,4 @@
 interface Lazy<T : Any?> {
-
 }
 
 fun test1($context_receiver_0: Lazy<Int>, $context_receiver_1: Lazy<CharSequence>) {

compiler/testData/ir/irText/declarations/contextReceivers/lazy.sig.kt.txt

@@ -2,7 +2,6 @@
 //   Mangled name: Lazy
 //   Public signature: /Lazy|null[0]
 interface Lazy<T : Any?> {
-
 }
 
 // CHECK:

compiler/testData/ir/irText/declarations/contextReceivers/plusMatrix.sig.kt.txt

@@ -14,7 +14,6 @@ class Matrix {
 //   Mangled name: NumberOperations
 //   Public signature: /NumberOperations|null[0]
 interface NumberOperations {
-
   // CHECK JVM_IR:
   //   Mangled name: NumberOperations#plus@kotlin.Number(kotlin.Number){}kotlin.Number
   //   Public signature: /NumberOperations.plus|-6518987633126930952[0]

compiler/testData/ir/irText/declarations/contextReceivers/property.sig.kt.txt

@@ -2,7 +2,6 @@
 //   Mangled name: A
 //   Public signature: /A|null[0]
 interface A {
-
   // CHECK JVM_IR:
   //   Mangled name: A#a(){}kotlin.Int
   //   Public signature: /A.a|5993980063692763883[0]
@@ -19,7 +18,6 @@ interface A {
 //   Mangled name: B
 //   Public signature: /B|null[0]
 interface B {
-
   // CHECK JVM_IR:
   //   Mangled name: B#b(){}kotlin.Int
   //   Public signature: /B.b|-6472101675379091489[0]

compiler/testData/ir/irText/declarations/contextReceivers/unaryOperators.sig.kt.txt

@@ -42,6 +42,7 @@ data class Result {
   //   Public signature: /Result.<init>|-5182794243525578284[0]
   //   Public signature debug description: <init>(kotlin.Int){}
   constructor(i: Int) /* primary */
+
   // CHECK JVM_IR:
   //   Mangled name: Result#component1(){}kotlin.Int
   //   Public signature: /Result.component1|-8217597213800111288[0]