Run dartfmt on remaining unformated pkg packages

pkg/testing/lib/src/test_root.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_root;
 
-import 'dart:async' show
-    Future;
+import 'dart:async' show Future;
 
-import 'dart:convert' show
-    JSON;
+import 'dart:convert' show JSON;
 
-import 'dart:io' show
-    File;
+import 'dart:io' show File;
 
-import '../testing.dart' show
-    Chain;
+import '../testing.dart' show Chain;
 
-import 'analyze.dart' show
-    Analyze;
+import 'analyze.dart' show Analyze;
 
-import 'suite.dart' show
-    Dart,
-    Suite;
+import 'suite.dart' show Dart, Suite;
 
 /// Records properties of a test root. The information is read from a JSON file.
 ///
 /// Example with comments:
 ///     {
 ///       # Path to the `.packages` file used.
 ///       "packages": "test/.packages",
 ///       # A list of test suites (collection of tests).
 ///       "suites": [
 ///         # A list of suite objects. See the subclasses of [Suite] below.
@@ skipping 21 matching lines @@
 
   TestRoot(this.packages, this.suites);
 
   Analyze get analyze => suites.last;
 
   List<Uri> get urisToAnalyze => analyze.uris;
 
   List<RegExp> get excludedFromAnalysis => analyze.exclude;
 
   Iterable<Dart> get dartSuites {
-    return new List<Dart>.from(
-        suites.where((Suite suite) => suite is Dart));
+    return new List<Dart>.from(suites.where((Suite suite) => suite is Dart));
   }
 
   Iterable<Chain> get toolChains {
-    return new List<Chain>.from(
-        suites.where((Suite suite) => suite is Chain));
+    return new List<Chain>.from(suites.where((Suite suite) => suite is Chain));
   }
 
   String toString() {
     return "TestRoot($suites, $urisToAnalyze)";
   }
 
   static Future<TestRoot> fromUri(Uri uri) async {
     String json = await new File.fromUri(uri).readAsString();
     Map data = JSON.decode(json);
 
@@ skipping 12 matching lines @@
   }
 
   static void addDefaults(Map data) {
     data.putIfAbsent("packages", () => ".packages");
     data.putIfAbsent("suites", () => []);
     Map analyze = data.putIfAbsent("analyze", () => {});
     analyze.putIfAbsent("uris", () => []);
     analyze.putIfAbsent("exclude", () => []);
   }
 }