plex -V (return code: 1)
TP Lex Version 4.1a [April 2000], Copyright (c) 1990-2000 Albert Graef
invalid option --version
plex (return code: 0)
TP Lex Version 4.1a [April 2000], Copyright (c) 1990-2000 Albert Graef
Usage: plex [options] lex-file[.l] [output-file[.pas]]
Options: -v verbose, -o optimize