Set HTML title to current page's title

content/blog/2015-04-24-prometheus-monitring-spreads-through-the-internet.md

 ---
-title: "Prometheus Monitoring Spreads through the Internet"
+title: Prometheus Monitoring Spreads through the Internet
 created_at: 2015-04-24
 kind: article
 author: Brian Brazil

content/blog/index.html

 ---
-title: Prometheus Blog
+title: Blog
 ---
 <div class="col-md-9">
   <% sorted_articles.each do |post| %>

content/community.html

+---
+title: Community
+---
 <div class="col-md-8 col-md-offset-2 doc-content">
   <h1>Community</h1>
   <p>

content/docs/index.md

 ---
-title: Prometheus Documentation
+title: Documentation
 is_hidden: true
 ---

content/docs/querying/basics.md

 ---
-title: Basics
+title: Querying basics
 sort_rank: 1
 ---
 

content/docs/querying/examples.md

 ---
-title: Examples
+title: Querying examples
 sort_rank: 4
 ---
 

content/docs/querying/functions.md

 ---
-title: Functions
+title: Query functions
 sort_rank: 3
 ---
 

content/index.html

----
-title: Home
----
 <div class="main">
   <div class="row">
     <div class="col-md-3">

layouts/header.html

@@ -27,7 +27,11 @@
     <meta name="msapplication-TileImage" content="/assets/favicons/mstile-144x144.png">
     <meta name="theme-color" content="#ffffff">
 
+    <% if @item[:title] %>
+    <title><%= @item[:title] %> | Prometheus</title>
+    <% else %>
     <title>Prometheus</title>
+    <% end %>
 
     <!-- Bootstrap core CSS -->
     <link href="/assets/bootstrap-3.3.1/css/bootstrap.min.css" rel="stylesheet">