Fixing last obstinate pep8 message

Just fixing up the last pep8 warning. Output from --help message after change:

> (uprip)aoife@odi:~/Projects/Upworthyripper$ python upworthyripper.py --help
> usage: upworthyripper.py [-h] [-l [LOGFILE]] link
> 
> positional arguments:
>   link                  Upworthy page to extract content from
> 
> optional arguments:
>   -h, --help            show this help message and exit
>   -l [LOGFILE], --logfile [LOGFILE]
>                        file to log any failures to. Default is .upworthyLog
>                        in the current directory.