@ignore function scope not working as documented

Create file test.php:

/**
 * @file
 * Foo.
 *
 * Foo bar.
 */

/**
 * Example of the problem.
 */
function foo() {
  // @ignore Drupal.Commenting.InlineComment.SpacingBefore:function
  //  Bar.
}

Then:

$ drupalcs -s test.php 

FILE: /var/www/html/drupal7/sites/all/modules/foo/test.php
----------------------------------------------------------------------
FOUND 1 ERROR AFFECTING 1 LINE
----------------------------------------------------------------------
 15 | ERROR | Comment indentation error, expected only 1 spaces
    |       | (Drupal.Commenting.InlineComment.SpacingBefore)
----------------------------------------------------------------------

Time: 34ms; Memory: 5.75Mb

Yet the documentation at https://www.drupal.org/node/144172 suggests the @ignore is correct:

$a = 'nothing ignored yet';

/**
 * My function
 */
function my_function() {
  // @ignore rule:function
  $b = 'the rule is ignored';
}

$c = 'the rule is no longer ignored';

function your_function() {
  $d = 'of course the rule is not ignored here either';
}