While reviewing a merge request from a team mate who is working on a new feature, you find some piece of code that seems to work perfectly well, but some functions are written in a style that you don't particularly favor. Your team has a document for code style guidelines, but this case is not covered there. What do you do?

Question

While reviewing a merge request from a team mate who is working on a new feature, you find some piece of code that seems to work perfectly well, but some functions are written in a style that you don't particularly favor. Your team has a document for code style guidelines, but this case is not covered there. What do you do?