title: Can't get Ruby DevKit configuration file autogenerated properly
body: <p>I've installed Ruby 2.0 with a Windows Ruby Installer, Unpacked DevKit (DevKit-mingw64-64-4.7.2-20130224-1432-sfx.exe) to Program Files and ran</p>
  
  <pre><code>ruby dk.rb init
  </code></pre>
  
  <p>but the generated <code>config.yml</code> file doesn't list my Ruby path. Its contents looks as follows:</p>
  
  <pre><code># This configuration file contains the absolute path locations of all
  # installed Rubies to be enhanced to work with the DevKit. This config
  # file is generated by the 'ruby dk.rb init' step and may be modified
  # before running the 'ruby dk.rb install' step. To include any installed
  # Rubies that were not automagically discovered, simply add a line below
  # the triple hyphens with the absolute path to the Ruby root directory.
  #
  # Example:
  #
  # ---
  # - C:/ruby19trunk
  # - C:/ruby192dev
  #
  ---
  </code></pre>
  
  <p>How to make dk.rb to generate valid <code>config.yml</code>?</p>