$def with (work, prefix="")
$ i18n_strings = {
$ "empty_label": _("Please provide a label."),
$ "empty_url": _("Please provide a URL."),
$ "invalid_url": _("Please enter a valid URL.")
$ }
* $_('"Good" means no spammy links, please. Keep them relevant to the book. Irrelevant sites may be removed. Blatant spam will be deleted without remorse.')