Fix a typo in example code (#205)
diff --git a/lib/src/multipart_request.dart b/lib/src/multipart_request.dart
index 7681143..78234ce 100644
--- a/lib/src/multipart_request.dart
+++ b/lib/src/multipart_request.dart
@@ -22,7 +22,7 @@
/// `multipart/form-data`. This value will override any value set by the user.
///
/// var uri = Uri.parse("http://pub.dartlang.org/packages/create");
-/// var request = new http.MultipartRequest("POST", url);
+/// var request = new http.MultipartRequest("POST", uri);
/// request.fields['user'] = 'nweiz@google.com';
/// request.files.add(new http.MultipartFile.fromFile(
/// 'package',
