Get rid of all the library tags.

lib/src/string_matchers.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 matcher.string_matchers;
-
 import 'interfaces.dart';
 
 /// Returns a matcher which matches if the match argument is a string and
 /// is equal to [value] when compared case-insensitively.
 Matcher equalsIgnoringCase(String value) => new _IsEqualIgnoringCase(value);
 
 class _IsEqualIgnoringCase extends _StringMatcher {
   final String _value;
   final String _matchValue;
 
@@ skipping 175 matching lines @@
     } else {
       result.write(character);
       skipSpace = false;
     }
   }
   return result.toString().trim();
 }
 
 bool _isWhitespace(String ch) =>
     ch == ' ' || ch == '\n' || ch == '\r' || ch == '\t';