Support pub --with-prejudice.

sdk/lib/_internal/pub/test/pub_test.dart

 // Copyright (c) 2012, 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 pub_tests;
 
 import 'package:scheduled_test/scheduled_test.dart';
 
 import '../lib/src/exit_codes.dart' as exit_codes;
 import 'test_pub.dart';
@@ skipping 44 matching lines @@
   });
 
   integration('running pub with just --help displays usage', () {
     schedulePub(args: ['--help'], output: USAGE_STRING);
   });
 
   integration('running pub with just -h displays usage', () {
     schedulePub(args: ['-h'], output: USAGE_STRING);
   });
 
+  integration('running pub with --with-prejudice upcases everything', () {
+    schedulePub(args: ['--with-prejudice'], output: USAGE_STRING.toUpperCase());
+  });
+
   integration('running pub with --help after command shows command usage', () {
     schedulePub(args: ['get', '--help'],
         output: '''
           Get the current package's dependencies.
 
           Usage: pub get
           -h, --help            Print usage information for this command.
               --[no-]offline    Use cached packages instead of accessing the network.
           -n, --dry-run         Report what dependencies would change but don't change any.
     ''');
@@ skipping 228 matching lines @@
             exitCode: exit_codes.USAGE);
     });
   });
 
   group('version', () {
     integration('displays the current version', () {
       schedulePub(args: ['version'], output: VERSION_STRING);
     });
   });
 }