Update charted to 0.4.8 and roll

packages/charcode/lib/charcode.dart

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
-/**
- * Defines symbolic names for character code points.
- *
- * Includes all ASCII and Latin-1 characters.
- *
- * Exports the libraries `ascii.dart` and `html_entity.dart`.
- *
- * Hides the characters `$minus`, `$sub` and `$tilde` from
- * `html_entities.dart`, since other characters have the same name in
- * `ascii.dart`.
- */
+/// Defines symbolic names for character code points.
+///
+/// Includes all ASCII and Latin-1 characters.
+///
+/// Exports the libraries `ascii.dart` and `html_entity.dart`.
+///
+/// Hides the characters `$minus`, `$sub` and `$tilde` from
+/// `html_entities.dart`, since other characters have the same name in
+/// `ascii.dart`.
 library charcode;
 
 export "ascii.dart";
 export "html_entity.dart" hide $minus, $tilde, $sub;