+1, I like having references to 3rd party bundles to help with common tasks.

However, I'd like to have this in a.. sidebar:: instead.

Maybe it's better if we make the section a bit shorter. Among the lines of:

In the development environment, theExceptionController of the TwigBundle is used instead of error pages. When testing your code in the production environment, the twig templates cache won't be updated, this means it's hard to test your custom error pages. Luckily, thewebfactory/exceptions-bundle_ solves this issue by providing a test controller.

Fixed

@xabbuh You're right, the bundle name is better than the composer vendor/package combo.

bump

Hey Matthias! Thanks for the bundle and this change - this is a very annoying thing indeed. Maybe someday it'll be in core, but until then, as Wouter mentioned, we should link to the best tool for the job. I haven't tried your bundle yet, so hopefully it's good ;). I think you should register it on KnpBundles.com too so it's a bit easier to find. And you will now be able to update your blog post where it references that we don't talk about this problem yet on the docs ;). Anyways, thanks a bunch!