title: "Unexpected trailing character" in sublime when trying to edit preferences
body: <p>I'm trying to change my sublime theme/colour scheme and i get 
  <a href="http://i.stack.imgur.com/KvoBD.png" rel="noreferrer">'unexpected trailing characters'</a></p>
  
  <p>When I try to save the /User/Preferences.sublime-settings with this config</p>
  
  <pre><code>{
      "theme": "Afterglow-green.sublime-theme",
      "color_scheme": "Packages/Theme - Afterglow/Afterglow.tmTheme"
  }
  
  {
      "tabs_small": true
  }
  </code></pre>
  
  <p>I can't work out why I would be getting that message?</p>