Roll Observatory deps (charted -> ^0.3.0)

packages/charted/lib/selection/selection_scope.dart

 /*
  * Copyright 2014 Google Inc. All rights reserved.
  *
  * Use of this source code is governed by a BSD-style
  * license that can be found in the LICENSE file or at
  * https://developers.google.com/open-source/licenses/bsd
  */
 
 part of charted.selection;
 
 /** SelectionScope represents a scope for all the data and DOM operations. */
 class SelectionScope {
   Expando _associations = new Expando();
   Expando<Map<String, Pair<Function, bool>>> _listeners = new Expando();
   Element _root;
 
   /** Creates a new selection scope with document as the root. */
   SelectionScope() {
     _root = document.documentElement;
   }
 
   /**
    * Creates a new selection scope with the first element matching
    * [selector] as the root.
    */
   SelectionScope.selector(String selector) {
-    if (selector == null || selector.isEmpty ){
+    if (selector == null || selector.isEmpty) {
       throw new ArgumentError('Selector cannot be empty');
     }
     _root = document.querySelector(selector);
   }
 
   /**
    * Creates a new selection scope with the passed [element] as [root].
    * Charted assumes that the element is already part of the DOM.
    */
   SelectionScope.element(Element element) {
@@ skipping 29 matching lines @@
    */
   Selection select(String selector) =>
       new _SelectionImpl.single(selector: selector, scope: this);
 
   /**
    * Creates a new [Selection] containing all elements matching [selector].
    * If no element matches, the resulting selection will not have any
    * elements in it.
    */
   Selection selectAll(String selector) =>
-      new _SelectionImpl.all(selector:selector, scope:this);
+      new _SelectionImpl.all(selector: selector, scope: this);
 
   /**
    * Creates a new [Selection] containing [elements].  Assumes that
    * all the given elements are descendants of [root] in DOM.
    */
   Selection selectElements(List<Element> elements) =>
       new _SelectionImpl.elements(elements, this);
 
   /**
    * Appends a new element to [root] and creates a selection containing
    * the newly added element.
    */
   Selection append(String tag) {
     var element = Namespace.createChildElement(tag, _root);
     root.children.add(element);
 
     return selectElements([element]);
   }
 }