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

compiler/testData/codegen/light-analysis/builtinStubMethods/immutableRemove.txt

@@ -4,7 +4,6 @@ public interface ImmutableCollection {
     public abstract @org.jetbrains.annotations.NotNull method remove(p0: java.lang.Object): ImmutableCollection
 }
 
-
 public final class ImmutableCollectionmpl {
     public method <init>(): void
     public @org.jetbrains.annotations.NotNull method add(p0: java.lang.Object): ImmutableCollection
@@ -26,7 +25,6 @@ public final class ImmutableCollectionmpl {
     public method toArray(p0: java.lang.Object[]): java.lang.Object[]
 }
 
-
 public final class ImmutableRemoveKt {
     public final static @org.jetbrains.annotations.NotNull method box(): java.lang.String
 }