Fix bad space handling in Uris.

tests/compiler/dart2js/path with spaces/library space/lib with spaces.dart

Index: tests/compiler/dart2js/path with spaces/library space/lib with spaces.dart
diff --git a/tests/language/built_in_identifier_prefix_library_abstract.dart b/tests/compiler/dart2js/path with spaces/library space/lib with spaces.dart
similarity index 54%
copy from tests/language/built_in_identifier_prefix_library_abstract.dart
copy to tests/compiler/dart2js/path with spaces/library space/lib with spaces.dart
index 01018c21f9796a6edfd2a8e7304f4db4e55d416b..16da6e3295bca2daa89abcf7104d7a492f7cd846 100644
--- a/tests/language/built_in_identifier_prefix_library_abstract.dart
+++ b/tests/compiler/dart2js/path with spaces/library space/lib with spaces.dart	
@@ -1,14 +1,9 @@
-// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
+// Copyright (c) 2014, 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 abstract;
+library spaces;
 
-class A {
-}
+part "part space/part space.dart";
 
-class B<T> {
-}
-
-class C<T, S> {
-}
+foo() => bar();