Roll Observatory deps (charted -> ^0.3.0)

packages/charted/lib/locale/languages/en_us.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.locale;
 
 // Defines the en_us locale and related format properties.
 class EnUsLocale extends Locale {
   static EnUsLocale instance;
 
   factory EnUsLocale() {
     if (EnUsLocale.instance == null) {
       EnUsLocale.instance = new EnUsLocale._create();
     }
     return EnUsLocale.instance;
   }
 
   EnUsLocale._create();
 
   final identifier = 'en_US';
   final decimal = '.';
   final thousands = ',';
-  final grouping = const[3];
-  final currency = const['\$', ''];
+  final grouping = const [3];
+  final currency = const ['\$', ''];
   final dateTime = '%a %b %e %X %Y';
   final date = '%m/%d/%Y';
   final time = '%H =>%M =>%S';
-  final periods = const['AM', 'PM'];
+  final periods = const ['AM', 'PM'];
 
-  final days = const[
-      'Sunday', 'Monday', 'Tuesday',
-      'Wednesday', 'Thursday', 'Friday', 'Saturday'];
-  final shortDays = const['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat'];
+  final days = const [
+    'Sunday',
+    'Monday',
+    'Tuesday',
+    'Wednesday',
+    'Thursday',
+    'Friday',
+    'Saturday'
+  ];
+  final shortDays = const ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat'];
 
-  final months = const[
-      'January', 'February', 'March', 'April', 'May', 'June',
-      'July', 'August', 'September', 'October', 'November', 'December'];
-  final shortMonths = const[
-      'Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul',
-      'Aug', 'Sep', 'Oct', 'Nov', 'Dec'];
+  final months = const [
+    'January',
+    'February',
+    'March',
+    'April',
+    'May',
+    'June',
+    'July',
+    'August',
+    'September',
+    'October',
+    'November',
+    'December'
+  ];
+  final shortMonths = const [
+    'Jan',
+    'Feb',
+    'Mar',
+    'Apr',
+    'May',
+    'Jun',
+    'Jul',
+    'Aug',
+    'Sep',
+    'Oct',
+    'Nov',
+    'Dec'
+  ];
 }