pep8 design changes

```
setup_mac.py:47:57: E226 missing whitespace around arithmetic operator
setup_mac.py:61:1: E265 block comment should start with '# '
setup_mac.py:62:1: E265 block comment should start with '# '
setup_mac.py:71:3: E124 closing bracket does not match visual indentation
setup_mac.py:74:65: E231 missing whitespace after ':'

run_tests.py:62:1: E302 expected 2 blank lines, found 1
run_tests.py:84:35: E261 at least two spaces before inline comment
run_tests.py:90:80: W292 no newline at end of file
```
I don't see the point in arguing about this longer. Actually improving the
comments is a better use of time than discussing whether to use one or two
spaces.

Am 13.10.2014 21:36 schrieb "Markus Hackspacher" <notifications@github.com>:
>
> In horizons/manager.py:
>
> > @@ -85,7 +89,7 @@ def __init__(self, session, networkinterface):
> >  self.session.timer.add_test(self.can_hash_value_check)
> >  self.session.timer.add_call(self.hash_value_check)
> >
> > - self._last_local_commands_send_tick = -1 # last tick, where local
commands got sent
>
> In this case are two blanks before # better.
>
> —
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