This is not a duplicate of this question, I believe.
I must put much effort into getting it into his pretty useless edits to be in usable state.
Should I Reject and edit, or Improve an edit, thus giving him +2 points?
I thought I might not get out without an example, so here it is:
He just added the
kbd formatting, while leaving everything else intact.
I had to re-write large text for it to become usable to my standards. Still not perfect, though, I will put more effort into it the next time.