Append newline to EOF for .txt test data files

Reverts and fixes 102f0d3

compiler/testData/loadJava/compiledKotlin/classObject/InnerClassInClassObject.txt

@@ -16,4 +16,4 @@ internal final class TestFirst {
     internal final inner class NotInnerClass {
         /*primary*/ public constructor NotInnerClass()
     }
-}
+}