Fix commas in author list (alshedivat#770)

Author: gzwongkk

_config.yml

@@ -102,7 +102,7 @@ bing_site_verification:  # out your bing-site-verification ID (Bing Webmaster)
 
 blog_name: # blog_name will be displayed in your blog page
 blog_nav_title: # your blog must have a title for it to be displayed in the nav bar
-blog_description:
+blog_description: #
 permalink: /blog/:year/:title/
 
 # Pagination