Author "Duplicated" at the bottom of posts

[Cyan101]

Example:

This relates to this piece of code
{{ author.real_name }} <a href="https://github.com/{{ author.github }}">{{ author.name }}</a> &mdash; {{ page.date | date: "%b %-d, %Y" }}

at https://github.com/y32/y32.github.io/blob/master/_layouts/post.html#L9

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The problem here is it displays the real name (if its found) and then their name (which links to github) which just looks weird when its repeating itself like in the picture above

I propose we change this line to:
<a href="https://github.com/{{ author.github }}">{{ author.real_name }}</a> &mdash; {{ page.date | date: "%b %-d, %Y" }}

But then this will place a blank for people with no real_name, i've been messing with it for a bit and cant get it to swap to author.name if it cant find a real_name :/ but if someone else can do this that would be great