title: Regular expression not working Maven fileset
body: <p>I am trying use regular expression in <code>maven-assembly-plugin</code> which is shown below. 
  There are files with the names starts with ABC502. I am trying to copy only the rpms with the 3 or 4 in suffix. Below one is not working.
  rpm names are given below</p>
  
  <blockquote>
    <p>ABC5023-buildnumber.rpm</p>
    
    <p>ABC5024-buildnumber.rpm</p>
    
    <p>ABC5025-buildnumber.rpm</p>
    
    <p>ABC5026-buildnumber.rpm</p>
  </blockquote>
  
  <pre><code>&lt;fileSet&gt;
      &lt;directory&gt;${project.build.directory}/tar_content/stackcontents/&lt;/directory&gt;
      &lt;outputDirectory&gt;scripts/data/rpms/&lt;/outputDirectory&gt;
      &lt;includes&gt;
          &lt;include&gt;%regex[ABC502(3|4)]-*.rpm&lt;/include&gt;
      &lt;/includes&gt;
      &lt;fileMode&gt;0755&lt;/fileMode&gt;
      &lt;directoryMode&gt;0755&lt;/directoryMode&gt;
  &lt;/fileSet&gt;
  </code></pre>