Function format_write_ack_plain 

pub fn format_write_ack_plain(
    body: &Value,
    when: &dyn Fn(&str) -> String,
) -> String

What remember, prefer and rule print to a person at a terminal. A preference or a lesson names its kind and its text. A rule names its verdict and its pattern, then the reason. The next line is the first eight characters of the id, which accept, forget and graded take, and when it comes up for review in local time. A pipe gets format_write_ack.