/*xml
   <module name="Checker">
     <module name="RegexpOnFilename"/>
   </module>
   */
   package com.puppycrawl.tools.checkstyle.checks.regexp.regexponfilename;
   /*
   // xdoc section -- start
   .../checkstyle.xml
  .../Test Example1.xml // violation, 'File match folder pattern '' and file pattern '\s'.'
  .../TestExample2.xml
  .../TestExample3.md
  .../TestExample4.xml
  // xdoc section -- end
  */
  class Example1{}