Revert "Format talk page front matter"

This reverts commit c7b6399a79.

source/_talks/drupal-8-php-libraries-drupalorg-api.md

@@ -2,28 +2,30 @@
 title: Having Fun with Drupal 8, PHP libraries and the Drupal.org API
 description: A crash course in developing PHP packages and Drupal 8 modules, based on the Drupal.org API.
 speakerdeck:
-  id: 6e42ae9620bb4e91b3955f8c30d66934
-  ratio: "1.77777777777778"
-  url: https://speakerdeck.com/opdavies/having-fun-with-drupal-8-php-libraries-and-the-drupal-dot-org-api
+    id: 6e42ae9620bb4e91b3955f8c30d66934
+    ratio: "1.77777777777778"
+    url: https://speakerdeck.com/opdavies/having-fun-with-drupal-8-php-libraries-and-the-drupal-dot-org-api
 image:
-  url: '%site.assets.url%/assets/images/talks/having-fun-drupalorg-api.png'
-  width: 2000
-  height: 1125
-  type: image/png
+    url: '%site.assets.url%/assets/images/talks/having-fun-drupalorg-api.png'
+    width: 2000
+    height: 1125
+    type: image/png
 video:
-  type: youtube
-  id: JyDjC7gGDpU
+    type: youtube
+    id: JyDjC7gGDpU
 events:
-    - name: DrupalCamp London 2019
-      location: London, UK
-      url: http://drupalcamp.london
-      date: 2019-03-03
-      time: "12:05 - 12:50"
-    - name: Drupal Bristol
-      location: Bristol, UK
-      url: https://www.drupalbristol.org.uk
-      date: 2018-04-18
-      joindin: https://joind.in/talk/14851
+    -
+        name: DrupalCamp London 2019
+        location: London, UK
+        url: http://drupalcamp.london
+        date: 2019-03-03
+        time: "12:05 - 12:50"
+    -
+        name: Drupal Bristol
+        location: Bristol, UK
+        url: https://www.drupalbristol.org.uk
+        date: 2018-04-18
+        joindin: https://joind.in/talk/14851
 ---
 
 A overview and demo of some of the open source projects that I’ve been working on lately that are based on information from the Drupal.org API, including a PHP library for the API itself as well as some Drupal 8 modules that use it.