Get rid of all the library tags.

lib/src/barback/transformer_config.dart

 // Copyright (c) 2013, 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 pub.barback.transformer_config;
-
 import 'package:glob/glob.dart';
 import 'package:path/path.dart' as p;
 import 'package:source_span/source_span.dart';
 import 'package:yaml/yaml.dart';
 
 import 'transformer_id.dart';
 
 /// The configuration for a transformer.
 ///
 /// This corresponds to the transformers listed in a pubspec, which have both an
@@ skipping 134 matching lines @@
       for (var exclude in excludes) {
         if (exclude.matches(pathWithinPackage)) return false;
       }
     }
 
     // If there are any includes, it must match one of them.
     return includes == null ||
         includes.any((include) => include.matches(pathWithinPackage));
   }
 }