When doing client work, especially in a team, I like to urge adherence to the WordPress coding standards. This is especially important with whitespace, in particular when other members of the team have their IDEs set up in certain ways that frustrate the standards. I wrote this quick little functions for your .vimrc that does some whitespace cleanup in the currently open buffer. (I’m sure there are a thousand better ways to do it, and you should feel free to let me know in the comments. This is just what I put together in 15 minutes.)

I’ve mapped it to F8. Modify as you’d like.