title: Regular Expression Error while matching a character
body: <p>I want a regex which check a character if it is A-z 0-9 space ' &amp; _ [ ] ^ `.</p>
  
  <pre><code>I tried [a-zA-Z0-9 '&amp;_[]^`]
  </code></pre>
  
  <p>It is having error.
  Please help.</p>