In general, yes editing is encouraged!
When you edit a question or an answer (and you don't have >2k reputation yet) it is entered in a review queue for peer review.
Edits remain in a pending state until they get enough votes to either approve them and make the edits take effect or reject them and discard the edit. Two votes in either direction will finalize the action, except on Stack Overflow where three votes are required.
The original author of the question or answer that is edited also gets notified and (if they act faster than the review queue) they can accept the edit as well, negating the requirement for two or three votes in the review queue.
https://serverfault.com/help/editing and https://serverfault.com/help/privileges/edit
Your proposed edit was reviewed and rejected by one reviewer with the default rejection: "This edit was intended to address the author of the post and makes no sense as an edit. It should have been written as a comment or an answer."
After that it remained in the review queue pending either one more rejection vote or two accept votes.
Subsequently the edit was accepted by the author of the original answer and applied.