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

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

@@ -3,7 +3,6 @@ public interface C {
     inner class C/Companion
 }
 
-
 public final static class C/Companion {
     private final static @org.jetbrains.annotations.NotNull field FOO: java.lang.String
     inner class C/Companion
@@ -11,7 +10,6 @@ public final static class C/Companion {
     public final @org.jetbrains.annotations.NotNull method getFOO(): java.lang.String
 }
 
-
 public final class ClassObjectInTraitKt {
     public final static @org.jetbrains.annotations.NotNull method box(): java.lang.String
 }