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

compiler/testData/codegen/light-analysis/bridges/propertyInConstructor.txt

@@ -3,7 +3,6 @@ public interface A {
     public abstract method setX(p0: java.lang.Object): void
 }
 
-
 public final class B {
     private @org.jetbrains.annotations.NotNull field x: java.lang.String
     public method <init>(@org.jetbrains.annotations.NotNull p0: java.lang.String): void
@@ -13,7 +12,6 @@ public final class B {
     public synthetic method setX(p0: java.lang.Object): void
 }
 
-
 public final class PropertyInConstructorKt {
     public final static @org.jetbrains.annotations.NotNull method box(): java.lang.String
 }