You missed something here, as I'vee written that "just change the default
menu entry 'Load Operating System' to say this inside (again, modify it
according according to the way you named your volumegroup and logical
volume). This means toreplace everything that's between the {} in that
section by this:"
Well, everything between those specific brackets (Load Operating System),
yes.
This was (IMO) badly worded on the Libreboot website.
I agree that "rather straightforward" is more subjective than I thought, but
what I meant was that the Libreboot instructions were clear enough if you
read carefully. But I should update the wiki page and add this in there.