I just got a recently posted question edited by a third person for what I consider very small elements that do not really add or subtract from the understanding or the meaning of the conveyed message. I don't know how to relate to this, I find it slightly intruding. Maybe it's just in good faith, a sort of proof-reading, but I just find it strange. I would like to know what the community consensus is about the topic. Here are the edits:
Edits that improve the grammar or spelling of posts are unquestionably welcome. StackExchange sites generally have a far weaker notion of "ownership" of posts than many other websites, and only 2k reputation are necessary to be granted the edit privilege that allows users to edit any post they want without having to go through review.
The help center page on editing spells out that this is intentional and calls out "To fix grammatical or spelling mistakes" as a valid reason to edit, among other things.