Don't use å in non-ascii test, as it can have multiple representations.

pkg/http_server/test/virtual_directory_test.dart

Index: pkg/http_server/test/virtual_directory_test.dart
diff --git a/pkg/http_server/test/virtual_directory_test.dart b/pkg/http_server/test/virtual_directory_test.dart
index 9bc65cfb8e646af9b188664aa1ef1cb9071ca020..81e0071894b3b10f202c52460a2d5c88e79b9e09 100644
--- a/pkg/http_server/test/virtual_directory_test.dart
+++ b/pkg/http_server/test/virtual_directory_test.dart
@@ -142,12 +142,12 @@ void main() {
 
       testVirtualDir('non-ascii-dir', (dir) {
         var virDir = new VirtualDirectory(dir.path);
-        new Directory('${dir.path}/æøå').createSync();
+        new Directory('${dir.path}/æø').createSync();
         virDir.allowDirectoryListing = true;
 
         return getAsString(virDir, '/')
           .then((result) {
-            expect(result, contains('æøå'));
+            expect(result, contains('æø'));
           });
       });