title: Regular expression failed replace
body: <p>I want to use Regular expression to replace this text :</p>
  
  <pre><code>[Button size="Big" color="#000"] test [/Button]
  </code></pre>
  
  <p>to <code>Button</code>, I used this site <a href="http://www.freeformatter.com/regex-tester.html" rel="nofollow">http://www.freeformatter.com/regex-tester.html</a> but not working the replace.<br>
  the Regular expression <code>\[Button([^\]]*)\[/Button]</code>,it give me the result <code>String is same as before replace!</code> what the mistake?</p>