配置文件/etc/default/grub有新版本可用,但当前安装的版本已被本地修改

配置文件/etc/default/grub有新版本可用,但当前安装的版本已被本地修改
sudo add-apt-repository ppa:graphics-drivers/ppa
sudo apt-get update
sudo apt update
sudo apt upgrade

然后出现这个屏幕,上面写着

A new version (/tmp/grub.5gRinQVE9u) of configuration file /etc/default/grub is available, but the version installed currently has been locally modified. 

What do you want to do about modified configuration file grub?

install the package maintainer's version
keep the local version currently installed 
show the differences between the versions
show a side-by-side difference between the versions
show a 3-way difference between available versions 
do a 3-way merge between available versions 
start a new shell to examine the situation

我该如何解决?

谢谢你!!

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