Run dartfmt on remaining unformated pkg packages

pkg/testing/lib/src/test_description.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_description;
 
-import 'dart:io' show
-    File,
-    FileSystemEntity;
+import 'dart:io' show File, FileSystemEntity;
 
 class TestDescription implements Comparable<TestDescription> {
   final Uri root;
   final File file;
   final Uri output;
 
   /// If non-null, this is a generated multitest, and the set contains the
   /// expected outcomes.
   Set<String> multitestExpectations;
 
@@ skipping 17 matching lines @@
   }
 
   void writeClosureOn(StringSink sink) {
     sink.write('    "');
     sink.write(shortName);
     sink.write('": ');
     sink.write(escapedName);
     sink.writeln('.main,');
   }
 
-  static TestDescription from(
-      Uri root, FileSystemEntity entity, {Pattern pattern}) {
+  static TestDescription from(Uri root, FileSystemEntity entity,
+      {Pattern pattern}) {
     if (entity is! File) return null;
     pattern ??= "_test.dart";
     String path = entity.uri.path;
     bool hasMatch = false;
     if (pattern is String) {
       if (path.endsWith(pattern)) hasMatch = true;
     } else if (path.contains(pattern)) {
       hasMatch = true;
     }
     return hasMatch ? new TestDescription(root, entity) : null;
   }
 
   int compareTo(TestDescription other) => "$uri".compareTo("${other.uri}");
 
   String formatError(String message) {
     String base = Uri.base.toFilePath();
     String path = uri.toFilePath();
     if (path.startsWith(base)) {
       path = path.substring(base.length);
     }
     return "$path:$message";
   }
 }