Run dartfmt on remaining unformated pkg packages

pkg/testing/lib/src/test_dart.dart

 // Copyright (c) 2016, 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.md file.
 
 library testing.test_dart;
 
-import 'dart:convert' show
-    JSON;
+import 'dart:convert' show JSON;
 
-import 'dart:io' show
-    Platform;
+import 'dart:io' show Platform;
 
-import 'suite.dart' show
-    Suite;
+import 'suite.dart' show Suite;
 
 /// A suite that runs test.dart.
 class TestDart extends Suite {
   final String common;
 
   final String processes;
 
   final List<String> commandLines;
 
   TestDart(String name, this.common, this.processes, this.commandLines)
-      : super(name, "test_dart",
-          // This suite doesn't know what it's status file is because test.dart
-          // doesn't know.
-          null);
+      : super(
+            name,
+            "test_dart",
+            // This suite doesn't know what it's status file is because
+            // test.dart doesn't know.
+            null);
 
   factory TestDart.fromJsonMap(Uri base, Map json, String name, String kind) {
     String common = json["common"] ?? "";
     String processes = json["processes"] ?? "-j${Platform.numberOfProcessors}";
     List<String> commandLines = json["command-lines"] ?? <String>[];
     return new TestDart(name, common, processes, commandLines);
   }
 
   void writeFirstImportOn(StringSink sink) {
     sink.writeln("import 'dart:io' as io;");
     sink.writeln(
         "import 'package:testing/src/stdio_process.dart' show StdioProcess;");
   }
 
   void writeRunCommandOn(StringSink sink) {
     Uri dartVm;
     if (Platform.isMacOS) {
       dartVm = Uri.base.resolve("tools/sdks/mac/dart-sdk/bin/dart");
     } else if (Platform.isWindows) {
       dartVm = Uri.base.resolve("tools/sdks/win/dart-sdk/bin/dart.exe");
     } else if (Platform.isLinux) {
       dartVm = Uri.base.resolve("tools/sdks/linux/dart-sdk/bin/dart");
     } else {
       throw "Operating system not supported: ${Platform.operatingSystem}";
     }
     List<String> processedArguments = <String>[];
-    processedArguments.add(Uri.base.resolve(
-            "tools/testing/dart/package_testing_support.dart").toFilePath());
+    processedArguments.add(Uri.base
+        .resolve("tools/testing/dart/package_testing_support.dart")
+        .toFilePath());
     for (String commandLine in commandLines) {
       String arguments = common;
       arguments += " $processes";
       arguments += " $commandLine";
       processedArguments.add(arguments);
     }
     String executable = JSON.encode(dartVm.toFilePath());
     String arguments = JSON.encode(processedArguments);
     sink.write("""
   {
     print('Running $arguments');
     StdioProcess process = await StdioProcess.run($executable, $arguments,
         suppressOutput: false, timeout: null);
     if (process.exitCode != 0) {
       print(process.output);
       io.exitCode = 1;
     }
   }
 """);
   }
 
   String toString() {
     return "TestDart($name, ${JSON.encode(common)}, ${JSON.encode(processes)},"
         " ${JSON.encode(commandLines)})";
   }
 }