WebSite.py: fix getExtensibleContent to correctly apply trailing slash

in case we publish with different languages

product/ERP5/Document/WebSite.py

@@ -177,11 +177,14 @@ class WebSite(WebSection):
             request['AcceptLanguage'].set(name, 100)
             request.set(WEBSITE_LANGUAGE_KEY, name)
           if self.isTempObject() or name == default_language:
-            redirect_path_list = [self.getOriginalDocument().absolute_url()]
+            original_url = self.getOriginalDocument().absolute_url()
+            if original_url.endswith('/'):
+              original_url = original_url[:-1]
+            redirect_path_list = [original_url]
             if name != default_language:
               redirect_path_list.append(name)
             redirect_path_list.extend(reversed(request['TraversalRequestNameStack']))
-            request['minimum_language_redirect_url'] = '/'.join(redirect_path_list)
+            request['minimum_language_redirect_url'] = '/'.join(redirect_path_list) + '/'
             query_string = request.get('QUERY_STRING')
             if query_string:
               request['minimum_language_redirect_url'] += '?' + query_string