Append newline to EOF for .txt test data files

Reverts and fixes 102f0d3

compiler/testData/diagnostics/testsWithStdLib/duplicateJvmSignature/delegatedProperty.txt

@@ -7,4 +7,4 @@ internal final class C {
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
     public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
-}
+}

compiler/testData/diagnostics/testsWithStdLib/duplicateJvmSignature/platformNames.txt

@@ -1,4 +1,4 @@
 package
 
 kotlin.platform.platformName(name = "bar": kotlin.String) internal fun foo(/*0*/ a: kotlin.Any): kotlin.Unit
-internal fun kotlin.Any.foo(): kotlin.Unit
+internal fun kotlin.Any.foo(): kotlin.Unit

compiler/testData/diagnostics/testsWithStdLib/duplicateJvmSignature/platformNamesDuplicate.txt

@@ -1,4 +1,4 @@
 package
 
 internal fun bar(/*0*/ a: kotlin.Any): kotlin.Unit
-kotlin.platform.platformName(name = "bar": kotlin.String) internal fun foo(/*0*/ a: kotlin.Any): kotlin.Unit
+kotlin.platform.platformName(name = "bar": kotlin.String) internal fun foo(/*0*/ a: kotlin.Any): kotlin.Unit

compiler/testData/diagnostics/testsWithStdLib/duplicateJvmSignature/platformStaticInClassObject.txt

@@ -22,4 +22,4 @@ internal final class Derived : Base {
         public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
         public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
     }
-}
+}

compiler/testData/diagnostics/testsWithStdLib/duplicateJvmSignature/platformStaticInObject.txt

@@ -24,4 +24,4 @@ internal object Derived : Base {
         public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
         public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
     }
-}
+}