Please don't use TABs. Always run ``mvn xar:format`` on Maven projects that generate XARs and review your changes before committing. Best is to use [Git Interactive Add](http://git-scm.com/book/en/Git-Tools-Interactive-Staging) to keep only the relevant changes. Also, don't mix formatting with actual changes. In this case (e.g. if ``mvn xar:format`` produces many changes) it's recommended to make a commit with just the formatting and then a separate commit with the actual changes. Otherwise it's hard to detect the real changes from the formatting changes.