Light analysis tests: do not render empty lines between classes and in the beginning

compiler/testData/codegen/light-analysis/defaultArguments/private/memberExtensionFunction.txt

@@ -5,7 +5,6 @@ public final class A {
     private final method foo(p0: int, p1: int): int
 }
 
-
 public final class A/B {
     synthetic final field this$0: A
     inner class A/B
@@ -13,7 +12,6 @@ public final class A/B {
     public final method bar(): int
 }
 
-
 public final class MemberExtensionFunctionKt {
     public final static @org.jetbrains.annotations.NotNull method box(): java.lang.String
 }