additional german translation

Submitted by: Liu

We did the same sanity cleanup for all other code.  Easier on the
eyes and easier to fork.  ;)

Discussed with: ad@

when a conditional is the last stament on the line, either make sure there's an extra new line or add some characters behind it.
"trim_blocks" is removing this new line otherwise (http://jinja.pocoo.org/docs/dev/api/#basics).