Make stocks-fn match the style for the Sky SDK

sky/examples/stocks-fn/lib/stock_data.dart

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 import "dart:math";
 
 // Snapshot from http://www.nasdaq.com/screening/company-list.aspx
 // Fetched 2/23/2014.
 // "Symbol","Name","LastSale","MarketCap","IPOyear","Sector","industry","Summary Quote",
 final List<List<String>> _kCompanyList = [
@@ skipping 2998 matching lines @@
   Stock lookupBySymbol(String symbol) {
     this.stocks.forEach((stock) {
       if (stock.symbol == symbol)
         return stock;
     });
     return null;
   }
 }
 
 final StockOracle oracle = new StockOracle.fromCompanyList(_kCompanyList);