:I concur.   Perhaps the editor does not understand that the sandbox should be used for such edits so that other editors can know what is going on.  Hundreds of edits are confusing enough.  But this and no edit summaries makes it very difficult to understand just what has occurred.  Could be some kind of spam or vandalism,  but at first glance, looks at least superficially OK. I will try to review and fix any problems as time allows.