- we actively try to generate deltas from a larger object to a
smaller one
- this means that the top-of-tree very seldom has deltas
- (ie deltas in _practice_ are "backwards deltas")
+ (i.e. deltas in _practice_ are "backwards deltas")
Again, we should reread that whole paragraph. Not just because
Linus has slipped Linus's Law in there on us, but because it is