It looks like revisions 3 and 2 in this answer's revision history are switched.
From discussing the apparent anomaly with @Rapptz (the author of one of the edits), he confirms that his edit was an "Improve" from the suggestion of @Anusha. The revisions have identical seconds-resolution timestamps as a result.
The review history confirms that this occurs and that there should be nothing left to do on the answer; however, the revision history implies that there is still a suggested edit left to review.
The revision history
The review history