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

compiler/testData/codegen/light-analysis/casts/literalExpressionAsGenericArgument/binaryExpressionCast.txt

@@ -2,7 +2,6 @@ public final class BinaryExpressionCastKt {
     public final static @org.jetbrains.annotations.NotNull method box(): java.lang.String
 }
 
-
 public final class Box {
     private final field value: java.lang.Object
     public method <init>(p0: java.lang.Object): void

compiler/testData/codegen/light-analysis/casts/literalExpressionAsGenericArgument/labeledExpressionCast.txt

@@ -4,7 +4,6 @@ public final class Box {
     public final method getValue(): java.lang.Object
 }
 
-
 public final class LabeledExpressionCastKt {
     public final static @org.jetbrains.annotations.NotNull method box(): java.lang.String
 }

compiler/testData/codegen/light-analysis/casts/literalExpressionAsGenericArgument/parenthesizedExpressionCast.txt

@@ -4,7 +4,6 @@ public final class Box {
     public final method getValue(): java.lang.Object
 }
 
-
 public final class ParenthesizedExpressionCastKt {
     public final static @org.jetbrains.annotations.NotNull method box(): java.lang.String
 }

compiler/testData/codegen/light-analysis/casts/literalExpressionAsGenericArgument/superConstructor.txt

@@ -4,12 +4,10 @@ public class Base {
     public final method getValue(): java.lang.Object
 }
 
-
 public final class Box {
     public method <init>(): void
 }
 
-
 public final class SuperConstructorKt {
     public final static @org.jetbrains.annotations.NotNull method box(): java.lang.String
 }

compiler/testData/codegen/light-analysis/casts/literalExpressionAsGenericArgument/unaryExpressionCast.txt

@@ -4,7 +4,6 @@ public final class Box {
     public final method getValue(): java.lang.Object
 }
 
-
 public final class UnaryExpressionCastKt {
     public final static @org.jetbrains.annotations.NotNull method box(): java.lang.String
 }

compiler/testData/codegen/light-analysis/casts/literalExpressionAsGenericArgument/vararg.txt

@@ -4,7 +4,6 @@ public final class Box {
     public final method getValue(): java.lang.Object
 }
 
-
 public final class VarargKt {
     public final static @org.jetbrains.annotations.NotNull method box(): java.lang.String
     public final static @org.jetbrains.annotations.NotNull method run(@org.jetbrains.annotations.NotNull p0: java.lang.Object[]): Box