Sometimes, due to a bad patch/merge, or to an incorrect IDEA setting, many whitespace-only will happen. I hate commiting this kind of changes together with meaninful changes, so I revert them all before commiting. I'd love IDEA a bit more if it did it for me. Here are a few places where this could be offered

• Right-click on the editor
• Diff window
• Commit window
• Changes window

And any other places that deals with changes.