title: Test if a word is singular or plural in Ruby on Rails
body: <p>Quick question.</p>
  
  <p>How can I test a word to see if it is singular or plural?</p>
  
  <p>I'd really like:</p>
  
  <pre><code>test_singularity('word') # =&gt; true
  test_singularity('words') # =&gt; false
  </code></pre>
  
  <p>I bet rails is capable!</p>
  
  <p>Thanks.</p>