Update charted to 0.4.8 and roll

packages/quiver/lib/src/iterables/partition.dart

 // Copyright 2014 Google Inc. All Rights Reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
 //     http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
 part of quiver.iterables;
 
-/**
- * Partitions the input iterable into lists of the specified size.
- */
+/// Partitions the input iterable into lists of the specified size.
 Iterable<List> partition(Iterable iterable, int size) {
   return iterable.isEmpty ? [] : new _Partition(iterable, size);
 }
 
 class _Partition extends IterableBase<List> {
   final Iterable _iterable;
   final int _size;
 
   _Partition(this._iterable, this._size) {
     if (_size <= 0) throw new ArgumentError(_size);
@@ skipping 17 matching lines @@
   bool moveNext() {
     var newValue = [];
     var count = 0;
     for (; count < _size && _iterator.moveNext(); count++) {
       newValue.add(_iterator.current);
     }
     _current = (count > 0) ? newValue : null;
     return _current != null;
   }
 }