title: Is there a github markdown language identifier for Objective C code?
body: <p>In the official <a href="http://github.github.com/github-flavored-markdown/" rel="noreferrer">github flavored markdown docs</a> they show how we can use fences to mark code blocks, and optionally we can supply a language identifier, such as</p>
  
  <pre><code>```ruby
  require 'redcarpet'
  markdown = Redcarpet.new("Hello World!")
  puts markdown.to_html
  ```
  </code></pre>
  
  <p>Is there a language identifier for Objective C? I've searched and cannot find a reference.</p>
  
  <p>Furthermore, is there a list of all supported language identifiers that can be used in github markdown?</p>