This is one spot where I strongly prefer the standard from the Google guidelines[1]. "Reviewers should not require the author to polish every tiny piece of a CL before granting approval. Rather, the reviewer should balance out the need to make forward progress compared to the importance of the changes they are suggesting." Getting caught up in all the little details rarely serves this purpose; more likely it's being done in the service of something anti-productive like a personality conflict.
[1]: https://google.github.io/eng-practices/review/reviewer/stand...