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

compiler/testData/codegen/light-analysis/collections/noStubsInJavaSuperClass.txt

@@ -16,7 +16,6 @@ public class A {
     public method toArray(p0: java.lang.Object[]): java.lang.Object[]
 }
 
-
 public final class C {
     public method <init>(): void
     public method add(p0: int, p1: java.lang.Object): void
@@ -31,10 +30,8 @@ public final class C {
     public @org.jetbrains.annotations.NotNull method subList(p0: int, p1: int): java.util.List
 }
 
-
 public interface L
 
-
 public final class MainKt {
     public final static @org.jetbrains.annotations.NotNull method box(): java.lang.String
 }