title: How to get help on a specific rake task?
body: <p>Is there a standard help command for individual rake tasks?  </p>
  
  <p><code>rake -h</code> displays the options for rake.</p>
  
  <p><code>rake -D</code> describes the rake tasks.</p>
  
  <p><code>rake mytask</code> runs mytask.</p>
  
  <p>Is there something like <code>rake -h mytask</code> that would describe mytask, and list its optional and/or required arguments?</p>
  
  <p>For example, the following code will run an individual test in rails:</p>
  
  <pre><code>rake test TEST=path_to_test
  </code></pre>
  
  <p>How do I discover that TEST=path_to_test is an optional argument to rake test?</p>