Get rid of all the library tags.

lib/src/base64/decoder.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.deecoder;
-
 import 'dart:convert';
 import 'dart:typed_data';
 
 import 'package:charcode/ascii.dart';
 
 import 'decoder_sink.dart';
 
 /// A mapping from ASCII character codes to their corresponding Base64 values.
 ///
 /// Characters with a value of `null` can't be decoded directly. This includes
@@ skipping 103 matching lines @@
     }
 
     return out;
   }
 
   Base64DecoderSink startChunkedConversion(Sink<List<int>> sink) {
     if (sink is! ByteConversionSink) sink = new ByteConversionSink.from(sink);
     return new Base64DecoderSink(sink);
   }
 }