On the Symfony blog Ryan Weaver shares a "behind the scenes" look at how the project handles and has automated their documentation generation process with the help of the Platform.sh service.
[Symfony's documentation](https://github.com/symfony/symfony-docs) is an open source project with more than 800 contributors. That’s great! But our goal is to always make it easier to contribute and faster to merge in changes. And today, we’ve started doing something really cool to improve our workflow: integration with [Platform.sh](https://platform.sh).
Platform.sh is a hosting solution that provides out-of-the-box continuous deployment for Symfony, Drupal and any other PHP applications. It extends the concept of a Git branch at the infrastructure level. Basically, this means that it’s easy to deploy every branch and/or Pull Request to its own URL.
He talks about the documentation's format (Sphinx) and how, while it does provide flexibility it also can lead to maintenance issues too. Changes can't be seen immediately and it's difficult to review. Instead they worked up a process where each pull request was automatically deployed to its own unique URL. This reduces both issues they were setting around instant feedback and review problems and provides a better experience for the developer overall.