awk '
FILENAME != prevfile {   # new file
    NR = 1               # reset line number
    prevfile = FILENAME
}
NF > 0 {
    if ($1 == lastword)
        printf "double %s, file %s, line %d\n",$1,FILENAME,NR
    for (i = 2; i <= NF; i++)
        if ($i == $(i-1))
            printf "double %s, file %s, line %d\n",$i,FILENAME,NR
    if (NF > 0)
        lastword = $NF
}' $*
