Fix listing of '' and '/'.

sdk/lib/io/file_system_entity.dart

 // Copyright (c) 2013, 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.
 
 part of dart.io;
 
 class FileSystemEntityType {
   static const FILE = const FileSystemEntityType._internal(0);
   static const DIRECTORY = const FileSystemEntityType._internal(1);
   static const LINK = const FileSystemEntityType._internal(2);
@@ skipping 588 matching lines @@
   }
 
   static _throwIfError(Object result, String msg, [String path]) {
     if (result is OSError) {
       throw new FileSystemException(msg, path, result);
     } else if (result is ArgumentError) {
       throw result;
     }
   }
 
   static String _trimTrailingPathSeparators(String path) {

[Søren Gjesse, 2014/01/09 10:33:10]

Is this method still used?

[Anders Johnsen, 2014/01/09 10:33:38]

Yes, by watching.

     // Don't handle argument errors here.
     if (path is! String) return path;
     if (Platform.operatingSystem == 'windows') {
       while (path.length > 1 &&
              (path.endsWith(Platform.pathSeparator) ||
               path.endsWith('/'))) {
         path = path.substring(0, path.length - 1);
       }
     } else {
       while (path.length > 1 && path.endsWith(Platform.pathSeparator)) {
         path = path.substring(0, path.length - 1);
       }
     }
     return path;
   }
+
+  static String _ensureTrailingPathSeparators(String path) {
+    // Don't handle argument errors here.
+    if (path is! String) return path;
+    if (path.isEmpty) path = '.';
+    if (Platform.operatingSystem == 'windows') {
+      while (!path.endsWith(Platform.pathSeparator) && !path.endsWith('/')) {
+        path = "$path${Platform.pathSeparator}";
+      }
+    } else {
+      while (!path.endsWith(Platform.pathSeparator)) {
+        path = "$path${Platform.pathSeparator}";
+      }
+    }
+    return path;
+  }
 }
 
 
 /**
  * Base event class emitted by [FileSystemEntity.watch].
  */
 class FileSystemEvent {
   /**
    * Bitfield for [FileSystemEntity.watch], to enable [FileSystemCreateEvent]s.
    */
@@ skipping 105 matching lines @@
     return buffer.toString();
   }
 }
 
 
 class _FileSystemWatcher {
   external static Stream<FileSystemEvent> watch(
       String path, int events, bool recursive);
   external static bool get isSupported;
 }