Changes to unix

Changes to unix:
commit 86d798975357c55fd0e5303c83f09844411c3837
Author: Herbert Valerio Riedel <hvr@gnu.org>
Date:   Thu Feb 6 12:33:55 2014 +0100

    M-x delete-trailing-whitespace & M-x untabify

    Signed-off-by: Herbert Valerio Riedel <hvr@gnu.org>