Fix interpolation in warning message. :(

utils/pub/validator/name.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 name_validator;
 
 import 'dart:io';
 
 import '../entrypoint.dart';
 import '../io.dart';
@@ skipping 17 matching lines @@
 
     return _libraries.transform((libraries) {
       for (var library in libraries) {
         var libName = path.basenameWithoutExtension(library);
         _checkName(libName, 'The name of "$library", "$libName",');
       }
 
       if (libraries.length == 1) {
         var libName = path.basenameWithoutExtension(libraries[0]);
         if (libName == entrypoint.root.name) return;
-        warnings.add('The name of "$libraries[0]", "$libName", should match '
+        warnings.add('The name of "${libraries[0]}", "$libName", should match '
             'the name of the package, "${entrypoint.root.name}".\n'
             'This helps users know what library to import.');
       }
     });
   }
 
   /// Returns a list of all libraries in the current package as paths relative
   /// to the package's root directory.
   Future<List<String>> get _libraries {
     var libDir = join(entrypoint.root.dir, "lib");
@@ skipping 35 matching lines @@
       builder
         ..add(source.substring(lastMatchEnd, match.start + 1))
         ..add("_")
         ..add(match.group(1).toLowerCase());
       lastMatchEnd = match.end;
     }
     builder.add(source.substring(lastMatchEnd));
     return builder.toString().toLowerCase();
   }
 }