Description:
------------
PHP 7 and newer seem to be stripping class docblock comments when invoked via ReflectionClass::__toString

Test script:
---------------
<?php

/**
 * ClassDocComment
 *
 * @copyright Copyright (c) 2011
 * @author author
 * @see http://php.net
 */
class ClassDocComment {

}

var_dump ((string) new ReflectionClass ('ClassDocComment'));
// or https://3v4l.org/CFHvk

Expected result:
----------------
string(305) "/**
 * ClassDocComment
 *
 * @copyright Copyright (c) 2011
 * @author author
 * @see http://php.net
 */
Class [ &lt;user&gt; class ClassDocComment ] {
  @@ /in/CFHvk 10-12

  - Constants [0] {
  }

  - Static properties [0] {
  }

  - Static methods [0] {
  }

  - Properties [0] {
  }

  - Methods [0] {
  }
}
"

Actual result:
--------------
string(203) "

Class [ &lt;user&gt; class ClassDocComment ] {
  @@ /in/CFHvk 10-12

  - Constants [0] {
  }

  - Static properties [0] {
  }

  - Static methods [0] {
  }

  - Properties [0] {
  }

  - Methods [0] {
  }
}
"