Yes, I was the one who made the comment about Go's lack of a -1 for slices in the first place. ;)

I was actually referencing the 0 part and thus saying Go does already have some syntactic sugar when dealing with slices. ie you can do:

   slice[5:]   // slice[:len(slice)]

but not

   slice[5:-1] // slice[:len(slice)-1]

Which is a great pity.

However I'll update my previous comment to make that clearer because I can totally understand how it reads confusingly.