title: Regular expression to match the exact suffix
body: <p>I am trying to match to a specific suffix only----for example only ends with <strong>".suffix"</strong>: "<em>me.suffix</em>" matches, but "<em>me.suffix.1234</em>" should not match.</p>
  
  <p>I tried the following expression, but it does not work.</p>
  
  <pre><code>.+\.suffix(?!.) 
  </code></pre>
  
  <p>Any ideas?  How to only match to a string that does not followed by anything except line break?</p>
  
  <p>Thank you!</p>