Comment 1 for bug 1258805

Thank you Konstantin.

The commands given by Boot-Repair were:
... dpkg --configure -a
... zypper remove -y grub*-common
... zypper install -y grub2

I plan to remove the first one, and replace the 2 others by:
... zypper --non-interactive remove grub*
... zypper --non-interactive install grub2