[KAPT] Improve stub formatting; check raw stubs in tests

Merge-request: KT-MR-14244
Merged-by: Pavel Mikhailovskii <Pavel.Mikhailovskii@jetbrains.com>

plugins/kapt3/kapt3-compiler/testData/converter/annotationWithVaragArguments.fir.txt

@@ -18,8 +18,8 @@ public abstract @interface A {
     public abstract int[] x();
 }
 
-////////////////////
 
+////////////////////
 
 /**
  * package {
@@ -39,10 +39,6 @@ public abstract @interface A {
 @kotlin.Metadata()
 public final class AnnotationWithVaragArgumentsKt {
 
-    public AnnotationWithVaragArgumentsKt() {
-        super();
-    }
-
     @A(x = {1})
     @B(x = "x", y = {1}, z = "z")
     @C(a = @A(x = {1}), b = @B(x = "x", y = {1}, z = "z"))
@@ -64,8 +60,8 @@ public final class AnnotationWithVaragArgumentsKt {
     }
 }
 
-////////////////////
 
+////////////////////
 
 /**
  * public final annotation class B : kotlin/Annotation {
@@ -99,8 +95,8 @@ public abstract @interface B {
     public abstract java.lang.String z();
 }
 
-////////////////////
 
+////////////////////
 
 /**
  * public final annotation class C : kotlin/Annotation {
@@ -128,8 +124,8 @@ public abstract @interface C {
     public abstract B b();
 }
 
-////////////////////
 
+////////////////////
 
 /**
  * public final annotation class D : kotlin/Annotation {
@@ -151,8 +147,8 @@ public abstract @interface D {
     public abstract java.lang.String[] x() default {"a", "b"};
 }
 
-////////////////////
 
+////////////////////
 
 /**
  * public final annotation class E : kotlin/Annotation {