Update charted to 0.4.8 and roll

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

 // Copyright 2013 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;
 
-/**
- * Returns an [Iterable] of [List]s where the nth element in the returned
- * iterable contains the nth element from every Iterable in [iterables]. The
- * returned Iterable is as long as the shortest Iterable in the argument. If
- * [iterables] is empty, it returns an empty list.
- */
+/// Returns an [Iterable] of [List]s where the nth element in the returned
+/// iterable contains the nth element from every Iterable in [iterables]. The
+/// returned Iterable is as long as the shortest Iterable in the argument. If
+/// [iterables] is empty, it returns an empty list.
 Iterable<List> zip(Iterable<Iterable> iterables) =>
     (iterables.isEmpty) ? const [] : new _Zip(iterables);
 
 class _Zip extends IterableBase<List> {
   final Iterable<Iterable> iterables;
 
   _Zip(Iterable<Iterable> this.iterables);
 
   Iterator<List> get iterator => new _ZipIterator(
       iterables.map((i) => i.iterator).toList(growable: false));
@@ skipping 12 matching lines @@
     var newValue = new List(_iterators.length);
     for (int i = 0; i < _iterators.length; i++) {
       var iter = _iterators[i];
       hasNext = hasNext && iter.moveNext();
       newValue[i] = iter.current;
     }
     _current = (hasNext) ? newValue : null;
     return hasNext;
   }
 }