Every editor has quirks, just like every author. Some changes may seem odd to you. Or you may be uncertain why the change was made.
I prefer to turn “OK” into “okay,” or “goodbye” into “good-bye.” These are all accurate, but this is my idiosyncrasy. I think it reads better. I think it looks better. And visual aesthetic, even when it comes to grammar and formatting, is important too.
So remember when you’re working with an editor that we all have these quirks. Not every change is a “quirk,” of course, but it’s something we all have! And if you’re wondering about a change, it may be something to keep in mind.