Enable group owner to add members

Refs: #2793

diff --git a/snf-astakos-app/astakos/im/forms.py b/snf-astakos-app/astakos/im/forms.py
index d5c893b..1f1f5ed 100644 (file)
--- a/snf-astakos-app/astakos/im/forms.py
+++ b/snf-astakos-app/astakos/im/forms.py
@@ -584,7 +584,7 @@ class AddGroupMembersForm(forms.Form):
         unknown = list(set(users) - set(u.email for u in db_entries))
         if unknown:
             raise forms.ValidationError(
-                _('Unknown users: %s' % unknown))
+                _('Unknown users: %s' % ','.join(unknown)))
         self.valid_users = db_entries
         return self.cleaned_data