diff --git a/kallithea/model/db.py b/kallithea/model/db.py
--- a/kallithea/model/db.py
+++ b/kallithea/model/db.py
@@ -48,8 +48,8 @@ import kallithea
 from kallithea.lib import ext_json
 from kallithea.lib.caching_query import FromCache
 from kallithea.lib.exceptions import DefaultUserException
-from kallithea.lib.utils2 import (
-    Optional, ascii_bytes, aslist, get_changeset_safe, get_clone_url, remove_prefix, safe_bytes, safe_int, safe_str, str2bool, urlreadable)
+from kallithea.lib.utils2 import (Optional, ascii_bytes, aslist, get_changeset_safe, get_clone_url, remove_prefix, safe_bytes, safe_int, safe_str, str2bool,
+                                  urlreadable)
 from kallithea.lib.vcs import get_backend
 from kallithea.lib.vcs.backends.base import EmptyChangeset
 from kallithea.lib.vcs.utils.helpers import get_scm