| (require mzlib/port) | package： compatibility-lib |
注意：该库已被废弃；请改用racket/port。
The mzlib/port library mostly re-provides racket/port.
函数
(strip-shell-command-start in) → void?
in : input-port?
Reads and discards a leading #! in in (plus
continuing lines if the line ends with a backslash). Since
#! followed by a forward slash or space is a comment, this
procedure is not needed before reading Scheme expressions.