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

compiler/testData/codegen/light-analysis/enum/abstractNestedClass.txt

@@ -2,7 +2,6 @@ public final class AbstractNestedClassKt {
     public final static @org.jetbrains.annotations.NotNull method box(): java.lang.String
 }
 
-
 public enum class E {
     public final static field ENTRY: E
     inner class E/Nested
@@ -11,7 +10,6 @@ public enum class E {
     public static method values(): E[]
 }
 
-
 public abstract static class E/Nested {
     inner class E/Nested
     public method <init>(): void