proc templateify(input: string; data: Table[string, string]; attributes: seq[
    TemplatingAttribute] = @[createAttribute("bold", bold),
                             createAttribute("italic", italic),
                             createAttribute("list_by_comma", list_by_comma), createAttribute(
    "list_by_newline", list_by_newline),
                             createAttribute("span_separated", span_separated)]): string {.
    ...raises: [KeyError, Exception], tags: [RootEffect], forbids: [].}