Append newline to EOF for .txt test data files

Reverts and fixes 102f0d3

compiler/testData/diagnostics/tests/inference/constraints/constraintOnFunctionLiteral.txt

@@ -4,4 +4,4 @@ package c {
     public fun </*0*/ T, /*1*/ R, /*2*/ C : kotlin.MutableCollection<in R>> kotlin.Array<out T>.mapTo(/*0*/ result: C, /*1*/ transform: (T) -> R): C
     internal fun kotlin.Array<kotlin.Int>.toArrayList(): java.util.ArrayList<kotlin.Int>
     internal fun kotlin.Array<kotlin.Int>.toIntArray(): kotlin.IntArray
-}
+}

compiler/testData/diagnostics/tests/inference/constraints/equalityConstraintOnNullableType.txt

@@ -16,4 +16,4 @@ internal final class _</*0*/ T> {
     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/tests/inference/constraints/notNullConstraintOnNullableType.txt

@@ -30,4 +30,4 @@ internal final class _</*0*/ T> {
     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/tests/inference/constraints/subtypeConstraintOnNullableType.txt

@@ -22,4 +22,4 @@ internal final class _</*0*/ T> {
     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/tests/inference/constraints/supertypeConstraintOnNullableType.txt

@@ -22,4 +22,4 @@ internal final class _</*0*/ T> {
     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
-}
+}