It happens sometimes that someone, frequently a new user, proposes a quite substantial addition to an answer. This addition can be a longer explanation of a term used by the answerer, a longer description of a software, etc. At the moment of writing, there is a proposed edit for this answer, with a longer explanation of the word sic.
Though in principle correct, I find these additions a bit too invasive with respect to the original post, especially in the case of a highly-voted one, and I'm frequently undecided on what to do (I sometimes skip the review).
Hence, the question: what to do with this kind of edits? Do we have a general, even implicit, policy on this?