/etc/bash_completion.d/snownews is in bash-completion 1:1.3-1ubuntu8.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 | # snownews(1) completion
have snownews &&
_snownews()
{
    local cur
    COMPREPLY=()
    _get_comp_words_by_ref cur
    if [[ "$cur" == -* ]]; then
        # return list of available options
        COMPREPLY=( $( compgen -W '--update --help --version \
            --disable-versioncheck -u -h -V' -- "$cur"))
    fi
} &&
complete -F _snownews snownews
# Local variables:
# mode: shell-script
# sh-basic-offset: 4
# sh-indent-comment: t
# indent-tabs-mode: nil
# End:
# ex: ts=4 sw=4 et filetype=sh
 |