Fix Tailwind post excerpt

source/_posts/2018-02-05-using-tailwind-css-in-your-drupal-theme.md

@@ -7,12 +7,15 @@ tags:
     - drupal-theming
     - tailwind-css
 ---
+{% block excerpt %}
 ## What is Tailwind?
 
 > Tailwind is a utility-first CSS framework for rapidly building custom user interfaces.
 
 It generates a number of utility classes that you can add to your theme's markup to apply different styling, as well as the ability to apply classes to other markup and create components comprised of utility classes using a custom `@apply` PostCSS directive.
+{% endblock %}
 
+{% block content %}
 ## Initial Configuration
 
 The installation and configuration steps are essentially the same as those outlined within the [Tailwind documentation][1], and should be performed within your custom theme's directory (e.g. `sites/all/themes/custom/mytheme` for Drupal 7 or `themes/custom/mytheme` for Drupal 8:
@@ -84,6 +87,7 @@ With the `!important` rule enabled though, the Tailwind’s class takes preceden
 ## Example
 
 For an example of Tailwind within a Drupal 8 theme, see the custom theme for the [Drupal Bristol website][0] on GitHub.
+{% endblock %}
 
 [0]: https://github.com/drupalbristol/drupal-bristol-website/tree/master/web/themes/custom/drupalbristol
 [1]: https://tailwindcss.com/docs/installation