Get rid of all the library tags.

lib/src/hash_sink.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 crypto.hash_base;
-
 import 'dart:typed_data';
 
 import 'package:typed_data/typed_data.dart';
 
 import 'digest.dart';
 import 'utils.dart';
 
 /// A base class for [Sink] implementations for hash algorithms.
 ///
 /// Subclasses should override [updateHash] and [digest].
@@ skipping 113 matching lines @@
     // hash.
     var offset = _pendingData.length;
     _pendingData.addAll(new Uint8List(8));
     _pendingData.buffer.asByteData().setUint64(offset, lengthInBits, _endian);
   }
 
   /// Rounds [val] up to the next multiple of [n], as long as [n] is a power of
   /// two.
   int _roundUp(int val, int n) => (val + n - 1) & -n;
 }