Get rid of all the library tags.

lib/src/option.dart

 // Copyright (c) 2014, 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.
 
-library args.src.option;
-
 import 'dart:collection';
 
 /// Creates a new [Option].
 ///
 /// Since [Option] doesn't have a public constructor, this lets [ArgParser]
 /// get to it. This function isn't exported to the public API of the package.
 Option newOption(String name, String abbreviation, String help,
     String valueHelp, List<String> allowed, Map<String, String> allowedHelp,
     defaultValue, Function callback, OptionType type,
     {bool negatable, bool splitCommas, bool hide: false}) {
@@ skipping 108 matching lines @@
   ///     --output text --output xml
   ///
   /// In the parsed [ArgResults], a multiple-valued option will always return
   /// a list, even if one or no values were passed.
   static const MULTIPLE = const OptionType._("OptionType.MULTIPLE");
 
   final String name;
 
   const OptionType._(this.name);
 }