retag: Remove excess line endings

retag: Remove excess line endings

In:

    commit 544b8bbcc7ec80d94c96f181886c51b177530a95
    Author: Stephen Finucane <stephen.finucane@intel.com>
    Date:   Fri Aug 21 15:32:17 2015 +0100

        trivial: Resolve PEP8 issues with 'management'

I noted that it wasn't all trivial changes. And indeed using the
stdin/stdout wrappers change the intended behaviour by adding a new
line.

The stderr wrapper also colors the line in red. Changed the last message
to be printed on stdout, seems more logical.

Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Stephen Finucane <stephen.finucane@intel.com>