Updates more categories

_config.yml

@@ -53,5 +53,5 @@ category_names:
   - React
   - Ruby
   - Ruby libraries
-  - VIM
+  - Vim
   - Others

promise.md

@@ -1,5 +1,6 @@
 ---
 title: Promises
+category: JavaScript
 ---
 
 Based on the [Promise API reference][promise] (mozilla.org).

qunit.md

@@ -1,5 +1,6 @@
 ---
 title: Qunit
+category: JavaScript libraries
 ---
 
     QUnit.module('a');

rack-test.md

@@ -1,5 +1,6 @@
 ---
-title: Rack-test
+title: rack-test
+category: Ruby libraries
 ---
 
 ```rb

rdoc.md

@@ -1,6 +1,6 @@
 ---
 title: Rdoc
-category: Ruby
+category: Markup
 ---
 
 ### Basic RDoc format

rename.md

@@ -1,5 +1,6 @@
 ---
 title: rename
+category: CLI
 ---
 
 ### Installation

rtorrent.md

@@ -1,5 +1,6 @@
 ---
 title: Rtorrent
+category: CLI
 ---
 
 ### Global

vagrant.md

@@ -1,5 +1,6 @@
 ---
 title: Vagrant
+category: Devops
 ---
 
 ### Get started

vagrantfile.md

@@ -1,7 +1,10 @@
-    # -*- mode: ruby -*-
-    # vi: set ft=ruby :
+---
+title: Vagrantfile
+category: Devops
+---
 
-    Vagrant.configure("2") do |config|
+```rb
+Vagrant.configure("2") do |config|
   # All Vagrant configuration is done here. The most common configuration
   # options are documented and commented below. For a complete reference,
   # please see the online documentation at vagrantup.com.
@@ -112,4 +115,9 @@
   # chef-validator, unless you changed the configuration.
   #
   #   chef.validation_client_name = "ORGNAME-validator"
-    end
+end
+```
+
+## Also see
+
+* [Vagrant](vagrant.html)