| (require mzlib/port) | package: compatibility-lib | 
NOTE: This library is deprecated; use racket/port, instead.
The mzlib/port library mostly re-provides racket/port.
procedure
(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.