There's no good reason to do such edits
I quickly checked with a developer and there doesn't seem to be any SE function that would result in such edit histories during regular edits due to any system function. Since the user in question has full edit rights there's no further barrier to trivial edits—even one character white space ones. Stack Exchange is community moderated and users with full edit privileges are expected to wield them properly.
The edit history you linked can possibly be triggered by having several edit tabs open or changing your mind during edit and hitting save instead of cancel anyways and some other benign actions. Intentional reasons could include bumping posts back to the front page via editing or increasing badge related counters. Certainly that's not behavior that's encouraged.
On a more mature site it takes longer to get to full edit privileges which is one barrier. In a private beta with lowered privilege barriers there's a certain advance trust given to private beta users. In any site status the mods (where existing) and especially the community managers have tools to handle users who repeatedly misuse their earned privileges or misbehave on the site.
As I mentioned above there's nothing barring a user with the necessary privileges from doing such edits in the first place. That's what privileges are all about. Reputation is earned and the privileges are the trust the system offers in return. If any other user is of the opinion that someone is abusing his privileges they can always ask about it on meta or contact the site moderators via flagging the post in question for moderator attention. Since this site is in private beta and no mods are chosen yet the SE community managers will tend to those flags.