Update SEO meta tags

Author: mattt

_includes/head.html

@@ -20,20 +20,19 @@
     <link rel="apple-touch-icon" sizes="152x152" href="/touch-icon-ipad-retina.png">
     <link rel="alternate" type="application/rss+xml" title="{{ site.title }}" href="{{ site.baseurl }}/feed.xml" />
 
-    <meta property="og:site_name" content="{{ site.title }}"/>
-    <meta property="og:image" content="{{ site.url }}/assets/images/touch-icon-ipad-retina.png"/>
-    <meta property="og:title" content="{{ meta_title }}"/>
-    <meta property="og:url" content="{{ site.url }}{{ page.url }}"/>
-    <meta property="og:description" content="{{ meta_description }}"/>
-
-    <meta name="twitter:card" content="summary"/>
-    <meta name="twitter:site" content="@SwiftDocOrg"/>
-    <meta name="twitter:creator" content="@SwiftDocOrg"/>
-    <meta name="twitter:title" content="{{ meta_title }}"/>
-    <meta name="twitter:image" content="{{ site.url }}/assets/images/touch-icon-ipad-retina.png"/>
-    <meta name="twitter:description" content="{{ meta_description | escape }}"/>
-    <meta name="twitter:url" content="{{ site.url }}{{ page.url }}"/>
+    <meta property="og:site_name" content="{{ site.title }}" />
+    <meta property="og:image" content="{{ site.url }}/touch-icon-ipad-retina.png" />
+    <meta property="og:title" content="{{ meta_title }}" />
+    <meta property="og:url" content="{{ site.url }}{{ page.url }}" />
+    <meta property="og:description" content="{{ meta_description }}" />
 
+    <meta name="twitter:card" content="summary" />
+    <meta name="twitter:site" content="@SwiftDocOrg" />
+    <meta name="twitter:creator" content="@SwiftDocOrg" />
+    <meta name="twitter:title" content="{{ meta_title }}" />
+    <meta name="twitter:image" content="{{ site.url }}/assets/images/touch-icon-ipad-retina.png" />
+    <meta name="twitter:description" content="{{ meta_description | escape }}" />
+    <meta name="twitter:url" content="{{ site.url }}{{ page.url }}" />
     {% asset screen.css %}
     {% asset application.js %}