Use four spaces in frontmatter blocks

source/_talks/deploying-php-fabric.md

@@ -2,40 +2,40 @@
 title: Deploying PHP Applications with Fabric
 description: How to use Fabric, a Python command line based library, to deploy your PHP applications.
 speakerdeck:
-  id: c147618ce07546ca92f92983c52d6a41
-  ratio: "1.77777777777778"
-  url: https://speakerdeck.com/opdavies/deploying-php-applications-with-fabric
+    id: c147618ce07546ca92f92983c52d6a41
+    ratio: "1.77777777777778"
+    url: https://speakerdeck.com/opdavies/deploying-php-applications-with-fabric
 tags: [meetup, conference, php, fabric]
 meta:
-  og:
-    title: Deploying PHP Applcations with Fabric
-    description: "You've built your PHP application, now learn how to deploy it with Fabric."
-    type: website
-    image:
-      url: '%site.assets_url%/assets/images/talks/deploying-php-fabric.png'
-      width: 2560
-      height: 1440
-      type: image/png
+    og:
+        title: Deploying PHP Applcations with Fabric
+        description: "You've built your PHP application, now learn how to deploy it with Fabric."
+        type: website
+        image:
+            url: '%site.assets_url%/assets/images/talks/deploying-php-fabric.png'
+            width: 2560
+            height: 1440
+            type: image/png
 events:
-  -
-    name: PHP North West 2017
-    location: Manchester, UK
-    date: 2017-10-01
-    time: "09:00 - 09:45"
-    url: http://conference.phpnw.org.uk/phpnw17
-    joindin: https://joind.in/talk/4e35d
-  -
-    name: PHP South West
-    location: Bristol, UK
-    url: https://phpsw.uk
-    date: 2017-09-13
-    joindin: https://joind.in/talk/a5ff3
-  -
-    name: Nomad PHP
-    date: 2017-04-20
-    time: "19:00 (CET)"
-    url: https://nomadphp.com
-    online: true
+    -
+        name: PHP North West 2017
+        location: Manchester, UK
+        date: 2017-10-01
+        time: "09:00 - 09:45"
+        url: http://conference.phpnw.org.uk/phpnw17
+        joindin: https://joind.in/talk/4e35d
+    -
+        name: PHP South West
+        location: Bristol, UK
+        url: https://phpsw.uk
+        date: 2017-09-13
+        joindin: https://joind.in/talk/a5ff3
+    -
+        name: Nomad PHP
+        date: 2017-04-20
+        time: "19:00 (CET)"
+        url: https://nomadphp.com
+        online: true
 ---
 
 You’ve built your application, and now you just need to deploy it. There are various ways that this could be done – from (S)FTP, to SCP and rsync, to running commands like “git pull” and “composer install” directly on the server (not recommended).