Bug#919029: grub-pc: meaningless message "RUB boot loader was previously installed..."

[François Revol]

Hi,
I also got this message and after an hour and more than 20 opened
Firefox tabs of searching where in the GRUB configuration files it could
be I ended up digging the package files to discover it was in debconf.

I think this should be documented on the wiki page at least…

And probably this message should list the existing values to give a clue.