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

compiler/testData/codegen/light-analysis/operatorConventions/nestedMaps.txt

@@ -4,7 +4,6 @@ public final class Map1 {
     public final @org.jetbrains.annotations.NotNull method get(p0: int, p1: int): Map2
 }
 
-
 public final class Map2 {
     public final static field INSTANCE: Map2
     private method <init>(): void
@@ -12,7 +11,6 @@ public final class Map2 {
     public final method set(p0: int, p1: int, p2: int): void
 }
 
-
 public final class NestedMapsKt {
     public final static @org.jetbrains.annotations.NotNull method box(): java.lang.String
 }