title: What will the '\$' regular expression match?
body: <p>I have found that, </p>
  
  <pre><code>$ :       Matches the end of the line
  \s:       Matches whitespace 
  \S:       Matches any non-whitespace character
  </code></pre>
  
  <p>But what exactly does <strong>\$</strong> do ?</p>