mootools/mootools-core — pull request #2389 by cezar-berea (2012-07-30 21:53:33+00:00)
Title: Allow working with multiple css classes at once

It would be nice to be able to work with multiple css classes at once in addClass/removeClass and friends. Right now, doing the following won't have the expected results:
```js
$('...').addClass('a b c');
$('...').removeClass('a b c');
$('...').hasClass('a b c');
$('...').toggleClass('a b c');
```
I tried to fix this with: 805414004ee43f45468d111b04d6c78d85608891.

By the way, it's very weird that you're not accepting pull requests :)