Modernize the package's style.

lib/src/iterable_zip.dart

 // Copyright (c) 2013, 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.
 
-/**
- * Zipping multiple iterables into one iterable of tuples of values.
- */
-library dart.pkg.collection.iterable_zip;
+import "dart:collection";
 
-import "dart:collection" show IterableBase;
-
-/**
- * Iterable that iterates over lists of values from other iterables.
- *
- * When [iterator] is read, an [Iterator] is created for each [Iterable] in
- * the [Iterable] passed to the constructor.
- *
- * As long as all these iterators have a next value, those next values are
- * combined into a single list, which becomes the next value of this
- * [Iterable]'s [Iterator]. As soon as any of the iterators run out,
- * the zipped iterator also stops.
- */
+/// Iterable that iterates over lists of values from other iterables.
+///
+/// When [iterator] is read, an [Iterator] is created for each [Iterable] in
+/// the [Iterable] passed to the constructor.
+///
+/// As long as all these iterators have a next value, those next values are
+/// combined into a single list, which becomes the next value of this
+/// [Iterable]'s [Iterator]. As soon as any of the iterators run out,
+/// the zipped iterator also stops.
 class IterableZip extends IterableBase<List> {
   final Iterable<Iterable> _iterables;
   IterableZip(Iterable<Iterable> iterables)
       : this._iterables = iterables;
 
-  /**
-   * Returns an iterator that combines values of the iterables' iterators
-   * as long as they all have values.
-   */
+  /// Returns an iterator that combines values of the iterables' iterators
+  /// as long as they all have values.
   Iterator<List> get iterator {
     List iterators = _iterables.map((x) => x.iterator).toList(growable: false);
     // TODO(lrn): Return an empty iterator directly if iterators is empty?
     return new _IteratorZip(iterators);
   }
 }
 
 class _IteratorZip implements Iterator<List> {
   final List<Iterator> _iterators;
   List _current;
   _IteratorZip(List iterators) : _iterators = iterators;
   bool moveNext() {
     if (_iterators.isEmpty) return false;
     for (int i = 0; i < _iterators.length; i++) {
       if (!_iterators[i].moveNext()) {
         _current = null;
         return false;
       }
     }
     _current = new List(_iterators.length);
     for (int i = 0; i < _iterators.length; i++) {
       _current[i] = _iterators[i].current;
     }
     return true;
   }
 
   List get current => _current;
 }