/sys$common/syshlp/helplib.hlb JOB, Qualifiers, /TRAILING_BLANKS  *Conan The Librarian (sorry for the slow response - running on an old VAX)

       /TRAILING_BLANKS (default)
       /NOTRAILING_BLANKS

    Controls whether input cards in the card deck are read in card
    image form or input records are truncated at the last nonblank
    character. By default, the system does not remove trailing blanks
    from records read through the card reader. Use the /NOTRAILING_
    BLANKS qualifier to request that input records be truncated.