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

compiler/testData/codegen/light-analysis/classes/privateOuterFunctions.txt

@@ -6,7 +6,6 @@ public final class C {
     public final @org.jetbrains.annotations.NotNull method foo(): java.lang.String
 }
 
-
 private final class C/Inner {
     synthetic final field this$0: C
     inner class C/Inner
@@ -14,12 +13,10 @@ private final class C/Inner {
     public final method innerFun(): void
 }
 
-
 public final class PrivateOuterFunctionsKt {
     public final static @org.jetbrains.annotations.NotNull method box(): java.lang.String
 }
 
-
 public interface Runnable {
     public abstract method run(): void
 }