Get rid of all the library tags.

lib/src/base64/encoder.dart

 // Copyright (c) 2015, 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 crypto.base64.encoder;
-
 import 'dart:convert';
 
 import 'package:charcode/ascii.dart';
 
 import 'encoder_sink.dart';
 
 /// A String representing a mapping from numbers between 0 and 63, inclusive, to
 /// their corresponding encoded character.
 ///
 /// This is the table for URL-safe encodings.
@@ skipping 125 matching lines @@
   }
 
   Base64EncoderSink startChunkedConversion(Sink<String> sink) {
     StringConversionSink stringSink = sink is StringConversionSink
         ? sink
         : new StringConversionSink.from(sink);
 
     return new Base64EncoderSink(stringSink, _urlSafe, _addLineSeparator);
   }
 }