[ubuntu@54.242.61.86] out: Configuring grub-pc
[ubuntu@54.242.61.86] out: -------------------

[ubuntu@54.242.61.86] out: A new version of configuration file /etc/default/grub is available, but the 
[ubuntu@54.242.61.86] out: version installed currently has been locally modified.

[ubuntu@54.242.61.86] out:   1. install the package maintainer's version
[ubuntu@54.242.61.86] out:   2. keep the local version currently installed
[ubuntu@54.242.61.86] out:   3. show the differences between the versions
[ubuntu@54.242.61.86] out:   4. show a side-by-side difference between the versions
[ubuntu@54.242.61.86] out:   5. show a 3-way difference between available versions
[ubuntu@54.242.61.86] out:   6. do a 3-way merge between available versions (experimental)
[ubuntu@54.242.61.86] out:   7. start a new shell to examine the situation

[ubuntu@54.242.61.86] out: What do you want to do about modified configuration file grub?