grep -xFq "diversion of $file to $theirfile by $package"; then
dpkg-divert --divert "$theirfile" --rename --package "$package" --add "$file"
fi
grep -xFq "diversion of $file to $theirfile by $package"; then
dpkg-divert --divert "$theirfile" --rename --package "$package" --add "$file"
fi