fixup! Atom syndication and archive support

nikola/plugins/task/sitemap/__init__.py

@@ -175,9 +175,9 @@ def scan_locs():
                                 continue
                         """ put Atom and RSS in sitemapindex[] instead of in urlset[], sitemap_path is included after it is generated """
                         if path.endswith('.xml') or path.endswith('.atom') or path.endswith('.rss'):
-                            knownroots = (u'<feed', u'<rss', u'<urlset')
+                            known_elm_roots = (u'<feed', u'<rss', u'<urlset')
                             filehead = io.open(real_path, 'r', encoding='utf8').read(512)
-                            if any([root in filehead for root in knownroots]) and path != sitemap_path:
+                            if any([elm_root in filehead for elm_root in known_elm_roots]) and path != sitemap_path:
                                 path = path.replace(os.sep, '/')
                                 lastmod = self.get_lastmod(real_path)
                                 loc = urljoin(base_url, base_path + path)