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

compiler/testData/codegen/light-analysis/reflection/mapping/fakeOverrides/javaMethod.txt

@@ -2,13 +2,11 @@ public final class JavaMethodKt {
     public final static @org.jetbrains.annotations.NotNull method box(): java.lang.String
 }
 
-
 public class TestBase {
     public method <init>(): void
     public final method id(): long
 }
 
-
 public final class TestChild {
     public method <init>(): void
 }