Update charted to 0.4.8 and roll

packages/code_transformers/lib/src/messages.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.
 
 /// Contains all warning messages produced by the code_transformers package.
 library code_transformers.src.messages;
 
 import 'package:code_transformers/messages/messages.dart';
 
 const NO_ABSOLUTE_PATHS = const MessageTemplate(
     const MessageId('code_transformers', 1),
-    'absolute paths not allowed: "%-url-%"', 'Absolute paths not allowed', '''
+    'absolute paths not allowed: "%-url-%"',
+    'Absolute paths not allowed',
+    '''
 The transformers processing your code were trying to resolve a URL and identify
 a file that they correspond to. Currently only relative paths can be resolved.
 ''');
 
 const INVALID_URL_TO_OTHER_PACKAGE = const MessageTemplate(
     const MessageId('code_transformers', 2),
     'Invalid URL to reach to another package: %-url-%. Path '
     'reaching to other packages must first reach up all the '
     'way to the %-prefix-% directory. For example, try changing the URL '
-    'to: %-fixedUrl-%', 'Invalid URL to reach another package', '''
+    'to: %-fixedUrl-%',
+    'Invalid URL to reach another package',
+    '''
 To reach an asset that belongs to another package, use `package:` URLs in
 Dart code, but in any other language (like HTML or CSS) use relative URLs that
 first go all the way to the `packages/` directory.
 
 The rules for correctly writing these imports are subtle and have a lot of
 special cases. Please review
 <https://www.dartlang.org/polymer/app-directories.html> to learn
 more.
 ''');
 
 const INVALID_PREFIX_PATH = const MessageTemplate(
     const MessageId('code_transformers', 3),
     'incomplete %-prefix-%/ path. It should have at least 3 '
     'segments %-prefix-%/name/path_from_name\'s_%-folder-%_dir',
-    'Incomplete URL to asset in another package', '''
+    'Incomplete URL to asset in another package',
+    '''
 URLs that refer to assets in other packages need to explicitly mention the
 `packages/` directory. In the future this requirement might be removed, but for
 now you must use a canonical URL form for it.
 
 For example, if `packages/a/a.html` needs to import `packages/b/b.html`,
 you might expect a.html to import `../b/b.html`. Instead, it must import
 `../../packages/b/b.html`.
 
 See [issue 15797](http://dartbug.com/15797) and
 <https://www.dartlang.org/polymer/app-directories.html> to learn more.
 ''');
 
 const UNSPECIFIED_FROM_IN_NON_LIB_ASSET = const MessageTemplate(
     const MessageId('code_transformers', 4),
     'Cannot create URI for %-id-% without specifying where to import it from.',
-    'Missing `from` argument.', '''
+    'Missing `from` argument.',
+    '''
 Assets outside of the lib folder can only be imported via relative URIs. Use
 the `from` argument in `assetIdToUri` to specify the location in the same
 package where you intend to import this asset from.
 ''');
 
 const IMPORT_FROM_DIFFERENT_PACKAGE = const MessageTemplate(
     const MessageId('code_transformers', 5),
-    'Not possible to import %-toId-% from %-fromId-%', 'Cannot import asset.',
+    'Not possible to import %-toId-% from %-fromId-%',
+    'Cannot import asset.',
     '''
 Assets outside of the lib folder can only be imported via relative URIs from
 assets in the same package. To import an asset from another package, you need to
 move it into the lib folder of your package.
 ''');