format code, removed unused variables and deprecated usage

test/command_test.dart

 // Copyright (c) 2014, 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.
 
 library command_test;
 
-import 'package:args/args.dart';
 import 'package:args/command_runner.dart';
 import 'package:unittest/unittest.dart';
 import 'utils.dart';
 
 void main() {
   var foo;
   setUp(() {
     foo = new FooCommand();
 
-      // Make sure [Command.runner] is set up.
+    // Make sure [Command.runner] is set up.
     new CommandRunner("test", "A test command runner.").addCommand(foo);
   });
 
   group(".invocation has a sane default", () {
     test("without subcommands", () {
-      expect(foo.invocation,
-          equals("test foo [arguments]"));
+      expect(foo.invocation, equals("test foo [arguments]"));
     });
 
     test("with subcommands", () {
       foo.addSubcommand(new AsyncCommand());
-      expect(foo.invocation,
-          equals("test foo <subcommand> [arguments]"));
+      expect(foo.invocation, equals("test foo <subcommand> [arguments]"));
     });
 
     test("for a subcommand", () {
       var async = new AsyncCommand();
       foo.addSubcommand(async);
 
-      expect(async.invocation,
-          equals("test foo async [arguments]"));
+      expect(async.invocation, equals("test foo async [arguments]"));
     });
   });
 
   group(".usage", () {
     test("returns the usage string", () {
       expect(foo.usage, equals("""
 Set a value.
 
 Usage: test foo [arguments]
 -h, --help    Print this usage information.
@@ skipping 52 matching lines @@
 -h, --help    Print this usage information.
 
 Run "test help" to see global options."""));
   });
 
   test("considers a command hidden if all its subcommands are hidden", () {
     foo.addSubcommand(new HiddenCommand());
     expect(foo.hidden, isTrue);
   });
 }