Update String.fromCharCodes from sdk

tool/input_sdk/lib/core/core.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.
 
 /**
  *
  * Built-in types, collections,
  * and other core functionality for every Dart program.
  *
  * This library is automatically imported.
@@ skipping 119 matching lines @@
  *     Uri dartlang = Uri.parse('http://dartlang.org/');
  *
  * ## Errors
  *
  * The [Error] class represents the occurrence of an error
  * during runtime.
  * Subclasses of this class represent specific kinds of errors.
  *
  * ## Other documentation
  *
- * For more information about how to use the built-in types, refer to
- * [Built-in Types](http://www.dartlang.org/docs/dart-up-and-running/contents/ch02.html#built-in-types)
+ * For more information about how to use the built-in types, refer to [Built-in
+ * Types](http://www.dartlang.org/docs/dart-up-and-running/contents/ch02.html#built-in-types)
  * in Chapter 2 of
  * [Dart: Up and Running](http://www.dartlang.org/docs/dart-up-and-running/).
  *
- * Also, see
- * [dart:core - Numbers, Collections, Strings, and More](http://www.dartlang.org/docs/dart-up-and-running/contents/ch03.html#ch03-dartcore---strings-collections-and-more)
+ * Also, see [dart:core - Numbers, Collections, Strings, and
+ * More](https://www.dartlang.org/docs/dart-up-and-running/ch03.html#dartcore---numbers-collections-strings-and-more)
  * for more coverage of classes in this package.
  *
  * The
  * [Dart Language Specification](http://www.dartlang.org/docs/spec/)
  * provides technical details.
  */
 library dart.core;
 
 import "dart:collection";
 import "dart:_internal" hide Symbol;
@@ skipping 27 matching lines @@
 part "set.dart";
 part "sink.dart";
 part "stacktrace.dart";
 part "stopwatch.dart";
 part "string.dart";
 part "string_buffer.dart";
 part "string_sink.dart";
 part "symbol.dart";
 part "type.dart";
 part "uri.dart";