title: In which version was this syntactic feature added to ruby?
body: <p>I was maintaining a ruby gem and it works fine with the latest ruby version on my machine. Recently, a user reported that a syntax feature doesn't work with his <code>ruby-2.0.0</code>.</p>
  
  <p>I meant to update the required version of ruby for this gem, so I intend to find out the least version that supports all the features.</p>
  
  <p>The feature that is incompatible with <code>2.0.0</code> is something like:</p>
  
  <pre><code>def my_method(*args, added_param:, &amp;block)
     ...
     super(*args, &amp;block)
  end
  </code></pre>
  
  <p>which I use to add a specific parameter to a method when this module is prepended to some class.</p>
  
  <p>I checked ruby change log, but still don't know which update this one is referring to.</p>