# HG changeset patch
# User Ludovic Chabant <ludovic@chabant.com>
# Date 1408688804 25200
# Node ID 99dea56238afa42ef7d15d3d9466430a9db5a24c
# Parent  efd0d3bacc9e56c7a1ca8eba37567f9818ad079e
Apparently Jinja doesn't understand `None` the way I thought.

diff -r efd0d3bacc9e -r 99dea56238af piecrust/data/builder.py
--- a/piecrust/data/builder.py	Thu Aug 21 23:09:31 2014 -0700
+++ b/piecrust/data/builder.py	Thu Aug 21 23:26:44 2014 -0700
@@ -98,7 +98,7 @@
     def debug_info(self):
         if self._page is not None and self._data is not None:
             return build_debug_info(self._page, self._data)
-        return None
+        return ''
 
     def _enableDebugInfo(self, page, data):
         self._page = page