This question already has an answer here:
This post has seem a whole stack of very small edits. In particular the last 4 edits were all < 6 characters.
Is there some mechanism to discourage such repeated small edits aside from CW which doesn't kick in after a very long timeThe user has a history of doing this, see for example:?
It is possible that the author may just be doing repeated edits to ensure that the post is always near the top of the "active" list.
For another example by the same user see This post.