Rename Files with Spaces

SAVEIFS=$IFS
IFS=$(echo -en "\n\b")
for file_name in $(ls *.ogg)
do
    file_number=$(echo "$file_name" | cut -d' ' -f 7 | cut -d '.' -f 1)
    mv $file_name $(printf "Track_%03d.ogg\n" $file_number)
done
IFS=$SAVEIFS