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

compiler/testData/codegen/light-analysis/builtinStubMethods/extendJavaCollections/abstractList.txt

@@ -16,7 +16,6 @@ public final class A {
     public final method size(): int
 }
 
-
 public final class AbstractListKt {
     public final static @org.jetbrains.annotations.NotNull method box(): java.lang.String
 }

compiler/testData/codegen/light-analysis/builtinStubMethods/extendJavaCollections/abstractMap.txt

@@ -18,7 +18,6 @@ public final class A {
     public final method values(): java.util.Collection
 }
 
-
 public final class AbstractMapKt {
     public final static @org.jetbrains.annotations.NotNull method box(): java.lang.String
 }

compiler/testData/codegen/light-analysis/builtinStubMethods/extendJavaCollections/abstractSet.txt

@@ -8,7 +8,6 @@ public final class A {
     public final method size(): int
 }
 
-
 public final class AbstractSetKt {
     public final static @org.jetbrains.annotations.NotNull method box(): java.lang.String
 }

compiler/testData/codegen/light-analysis/builtinStubMethods/extendJavaCollections/arrayList.txt

@@ -14,7 +14,6 @@ public final class A {
     public final method size(): int
 }
 
-
 public final class ArrayListKt {
     public final static @org.jetbrains.annotations.NotNull method box(): java.lang.String
 }

compiler/testData/codegen/light-analysis/builtinStubMethods/extendJavaCollections/hashMap.txt

@@ -18,7 +18,6 @@ public final class A {
     public final method values(): java.util.Collection
 }
 
-
 public final class HashMapKt {
     public final static @org.jetbrains.annotations.NotNull method box(): java.lang.String
 }

compiler/testData/codegen/light-analysis/builtinStubMethods/extendJavaCollections/hashSet.txt

@@ -8,7 +8,6 @@ public final class A {
     public final method size(): int
 }
 
-
 public final class HashSetKt {
     public final static @org.jetbrains.annotations.NotNull method box(): java.lang.String
 }

compiler/testData/codegen/light-analysis/builtinStubMethods/extendJavaCollections/mapEntry.txt

@@ -2,7 +2,6 @@ public final class MainKt {
     public final static @org.jetbrains.annotations.NotNull method box(): java.lang.String
 }
 
-
 public final class MyMapEntry {
     public method <init>(): void
 }