From dc19a8fa5be68990a8e1f1a24d72a1afaae61dfd Mon Sep 17 00:00:00 2001
From: Ian McCowan <imccowan@gmail.com>
Date: Sun, 2 Feb 2014 20:11:59 -0800
Subject: [PATCH] Return an empty string for missing summary lines. Can't
 compare None to strings in Py3k.

---
 doc/autobuild.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/doc/autobuild.py b/doc/autobuild.py
index 362816dcd..932877fc0 100644
--- a/doc/autobuild.py
+++ b/doc/autobuild.py
@@ -160,7 +160,7 @@ template_examples_ref = \
 
 def extract_summary_line(doc):
     if doc is None:
-        return
+        return ""
     for line in doc.split('\n'):
         line = line.strip()
         # don't take empty line