Get rid of all the library tags.

test/yaml_test.dart

 // Copyright (c) 2012, 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 yaml.test;
-
 import 'package:test/test.dart';
 import 'package:yaml/yaml.dart';
 
 import 'utils.dart';
 
 main() {
   var infinity = double.parse("Infinity");
   var nan = double.parse("NaN");
 
   group('has a friendly error message for', () {
@@ skipping 1859 matching lines @@
         A null: null
         Also a null: # Empty
         Not a null: ""
         Booleans: [ true, True, false, FALSE ]
         Integers: [ 0, 0o7, 0x3A, -19 ]
         Floats: [ 0., -0.0, .5, +12e03, -2E+05 ]
         Also floats: [ .inf, -.Inf, +.INF, .NAN ]''');
     });
   });
 }