symfony/symfony-docs — pull request #2009 by fabstei (2012-12-08 01:25:51+00:00)
Title: Typo: $app->getHelperSet() instead of $this->getHelperSet()

I'm not entirely sure but there seems to be a typo (in components/console/introduction.rst on line 386).

In my opinion

$progress = $app->getHelperSet()->get('progress');

should be

$progress = $this->getHelperSet()->get('progress');

$app is never instantiated, $this seems more consistent and less confusing.