Get rid of all the library tags.

test/utils.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 yaml.test.utils;
-
 import 'package:test/test.dart';
 import 'package:yaml/src/equality.dart' as equality;
 import 'package:yaml/yaml.dart';
 
 /// A matcher that validates that a closure or Future throws a [YamlException].
 final Matcher throwsYamlException = throwsA(new isInstanceOf<YamlException>());
 
 /// Returns a matcher that asserts that the value equals [expected].
 ///
 /// This handles recursive loops and considers `NaN` to equal itself.
@@ skipping 60 matching lines @@
 String indentLiteral(String text) {
   var lines = text.split('\n');
   if (lines.length <= 1) return text;
 
   for (var i = 0; i < lines.length; i++) {
     lines[i] = "        ${lines[i]}";
   }
 
   return lines.join("\n");
 }