Fix treewalkers to never generate DOCTYPE tokens with None as the name (replaced with an empty unicode string)

tbroyer · tbroyer · commit b08102bec6c9 · 2007-07-09T18:44:58.000Z
--HG--
extra : convert_revision : svn%3Aacbfec75-9323-0410-a652-858a13e371e0/trunk%40882
diff --git a/src/html5lib/treewalkers/_base.py b/src/html5lib/treewalkers/_base.py
@@ -52,7 +52,8 @@ def comment(self, data):
         return {"type": "Comment", "data": unicode(data)}
 
     def doctype(self, name, publicId=None, systemId=None, correct=True):
-        return {"type": "Doctype", "name": name and unicode(name) or None,
+        return {"type": "Doctype",
+                "name": name is not None and unicode(name) or u"",
                 "publicId": publicId, "systemId": systemId,
                 "correct": correct}
 
