# HG changeset patch
# User Jordi Gutiérrez Hermoso <jordigh@octave.org>
# Date 2015-05-10 17:33:51
# Node ID c54248bbe023e2fbc3847dfc66d93044ede5072f
# Parent  30f449378f643da08ba03b845b5a64a8ceea57da

templatefilters: don't stringify None into "None"

A few template keywords can in fact return None, such as {bisect}. In
some contexts, these get stringified into None instead of "". This is
leaking Python details into the UI.

diff --git a/mercurial/templatefilters.py b/mercurial/templatefilters.py
--- a/mercurial/templatefilters.py
+++ b/mercurial/templatefilters.py
@@ -326,6 +326,8 @@ def stringify(thing):
     """
     if util.safehasattr(thing, '__iter__') and not isinstance(thing, str):
         return "".join([stringify(t) for t in thing if t is not None])
+    if thing is None:
+        return ""
     return str(thing)
 
 def strip(text):