VMS Help SPAWN, Qualifiers, /CARRIAGE_CONTROL  *Conan The Librarian (sorry for the slow response - running on an old VAX)

       /CARRIAGE_CONTROL
       /NOCARRIAGE_CONTROL

    Determines whether carriage-return and line-feed characters are
    prefixed to the subprocess's prompt string. By default, SPAWN
    copies the current setting of the parent process.