All docs stored in _docs inherit from docs layout All news items stored in _posts inherit from news-item layout
In case of the GitHub example links like `<a href="https://github.com/{{ org.username }}">` with the full URL plus the variable were used, but for the Twitter example link only the `{{ author.name }}` was set as `href`.
Previously the YAML example would contains the string 'yaml' at the top of the file. Very confusing for newcomers.