Add missing newline after Actual value in fail message.

pkg/scheduled_test/test/descriptor/file_test.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 import 'dart:async';
 import 'dart:io';
 
 import 'package:pathos/path.dart' as path;
 import 'package:scheduled_test/descriptor.dart' as d;
 import 'package:scheduled_test/scheduled_test.dart';
@@ skipping 204 matching lines @@
             .writeAsString('barfoobaz');
       });
 
       d.matcherFile('name.txt', contains('baaz')).validate();
     });
 
     test('test 2', () {
       expect(errors, everyElement(new isInstanceOf<ScheduleError>()));
       expect(errors.map((e) => e.error.message), equals([
         "Expected: contains 'baaz'\n"
-        "  Actual: 'barfoobaz'"
+        "  Actual: 'barfoobaz'\n"
       ]), verbose: true);
     });
   }, passing: ['test 2']);
 
   expectTestsPass('binaryMatcherFile().validate() completes successfully if '
       'the string contents of the file matches the matcher', () {
     test('test', () {
       scheduleSandbox();
 
       schedule(() {
@@ skipping 20 matching lines @@
             .writeAsString('barfoobaz');
       });
 
       d.binaryMatcherFile('name.txt', contains(12)).validate();
     });
 
     test('test 2', () {
       expect(errors, everyElement(new isInstanceOf<ScheduleError>()));
       expect(errors.map((e) => e.error.message), equals([
         "Expected: contains <12>\n"
-        "  Actual: [98, 97, 114, 102, 111, 111, 98, 97, 122]"
+        "  Actual: [98, 97, 114, 102, 111, 111, 98, 97, 122]\n"
       ]), verbose: true);
     });
   }, passing: ['test 2']);
 }