title: Ruby extract part of string
body: <p>I have the following string ...</p>
  
  <pre><code>CN=KendallLDAPTEST Weihe,OU=CORPUSERS,OU=CORP,DC=int,DC=appriss,DC=com
  </code></pre>
  
  <p>and I need to extract <code>KendallLDAPTEST Weihe</code></p>
  
  <p>in other words I need to extract all string data between the first <code>=</code> and the first <code>,</code></p>