Whitespace changes to fix complaints from flake8

Hi Will,

These are some minor modifications to this very nice example such that it passes flake8 w/o complaining.

I'm not sure if what I did to this line [1] is appropriate.  How do you handle the 79 column limit in :param docstrings?

PS http://will.m.aier.us/python-script is broken, I took the liberty of putting it on readthedocs [2] (pointing to your repo).  Let me know if you prefer that I take it down.

PPS Me and the fam are going to be in Madison for May & June, perhaps we can get some fancy beer or somesuch.

Evan

[1] https://github.com/ekfriis/python-script/pull/new/master#L1R162
[2] https://python-script.readthedocs.org/en/latest/