Append newline to EOF for .txt test data files

Reverts and fixes 102f0d3

compiler/testData/diagnostics/tests/resolve/specialConstructions/elvisAsCall.txt

@@ -16,4 +16,4 @@ package a {
         public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
         public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
     }
-}
+}

compiler/testData/diagnostics/tests/resolve/specialConstructions/exclExclAsCall.txt

@@ -15,4 +15,4 @@ package a {
         public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
         public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
     }
-}
+}

compiler/testData/diagnostics/tests/resolve/specialConstructions/reportTypeMismatchDeeplyOnBranches.txt

@@ -6,4 +6,4 @@ package b {
     internal fun test(/*0*/ a: kotlin.Int?, /*1*/ b: kotlin.Any?, /*2*/ c: kotlin.Int?): kotlin.Unit
     internal fun test(/*0*/ a: kotlin.Int?, /*1*/ b: kotlin.Int?): kotlin.Unit
     internal fun test(/*0*/ a: kotlin.Int?, /*1*/ b: kotlin.Int?, /*2*/ c: kotlin.Int?): kotlin.Unit
-}
+}