This documentation is rendered online at http://symfony.com/doc/current/
Note Unless you're documenting a feature that's new to a specific version of Symfony (e.g. Symfony 2.1), all pull requests must be based off of th 570A e 2.0 branch, not the master or 2.1 branch.
We love contributors! For more information on how you can contribute to the Symfony documentation, please read Contributing to the Documentation