From fac360d744b1a8d0618ac1fdf1031b1b84829fb2 Mon Sep 17 00:00:00 2001
From: Julien Baley <julien.baley@gmail.com>
Date: Mon, 14 Apr 2014 17:21:28 +0100
Subject: [PATCH] Allows smoother transition from old modifier syntax
 {{a:b:fld}} to new one {{a(b):fld}}

---
 anki/template/template.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/anki/template/template.py b/anki/template/template.py
index 33bfd6ea8..9431d30cc 100644
--- a/anki/template/template.py
+++ b/anki/template/template.py
@@ -192,7 +192,7 @@ class Template(object):
             else:
                 # hook-based field modifier
                 mod, extra = re.search("^(.*?)(?:\((.*)\))?$", mod).groups()
-                txt = runFilter('fmod_' + mod, txt or '', extra, context,
+                txt = runFilter('fmod_' + mod, txt or '', extra or '', context,
                                 tag, tag_name);
                 if txt is None:
                     return '{unknown field %s}' % tag_name