val diff_files : Configuration.t ‑> old_file:string ‑> new_file:string ‑> [ `Different | `Same ]val diff_dirs : Configuration.t ‑> old_file:string ‑> new_file:string ‑> file_filter:(Core_extended.Std.Find.file_info ‑> bool) option ‑> [ `Different | `Same ]val diff_strings : ?print_global_header:bool ‑> Configuration.t ‑> old:Patdiff_core.diff_input ‑> new_:Patdiff_core.diff_input ‑> [ `Different of string | `Same ]