[svn] added groupby filter and fixed some small bugs

--HG--
branch : trunk
diff --git a/tests/runtime/exception.py b/tests/runtime/exception.py
index 6043746..0af7955 100644
--- a/tests/runtime/exception.py
+++ b/tests/runtime/exception.py
@@ -54,9 +54,8 @@
 {% include 'syntax_broken' %}
     ''',
 
-    '/code_runtime_error': u'''
-{{ broken() }}
-''',
+    '/code_runtime_error': u'''We have a runtime error here:
+    {{ broken() }}''',
 
     'runtime_broken': '''\
 This is an included template