civicrm/civicrm-core — pull request #2262 by eileenmcnaughton (2014-01-02 04:04:28+00:00)
Title: Whitespace  - tabs introduced in 5bd361934f5dd97d2e3ef40d15

NB - per my comments here - I'm not sure the changes were correct

https://github.com/civicrm/civicrm-core/commit/5bd361934f5dd97d2e3ef40d15f0946541e546cb#commitcomment-4966980