That would certainly help to curb the problem. On the flip side of that, a couple of things that have helped to stop it before it gets to that level are to ask

That would certainly help to curb the problem. On the flip side of that, a couple of things that have helped to stop it before it gets to that level are to ask the developers to enable "auto-trim whitespace" and to enable the option to show whitespace and/or hidden characters. Most editors can do these things. They go a long way toward stomping out the problem, even if auto-formatters aren't being used. Highlighting trailing spaces are an option in git diffs too, though the devs who submit them typically don't look at their own diffs after they've pushed them (at least in my experience)