type test = {markdown : string;html : string;example : int;start_line : int;end_line : int;section : string;
}val parse_tests : string -> (test list, string) Stdlib.resultval diff : spec:string -> string -> stringval ok : string B0_std.Fmt.tval fail : string B0_std.Fmt.tval cli : exe:string -> unit -> bool * string * int list