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

compiler/testData/codegen/light-analysis/callableReference/bound/multiCase.txt

@@ -6,7 +6,6 @@ public final class A {
     public final method setV(p0: int): void
 }
 
-
 public final class F {
     public final static field INSTANCE: F
     private static field u: int
@@ -15,7 +14,6 @@ public final class F {
     public final method setU(p0: int): void
 }
 
-
 public final class MultiCaseKt {
     public final static @org.jetbrains.annotations.NotNull method box(): java.lang.String
     public final static method g(@org.jetbrains.annotations.NotNull p0: A, p1: int): int