rails/rails — pull request #8271 by senny (2012-11-19 16:24:15+00:00)
Title: backport #8262, require bundler groups to include rake-tasks in engines

If you generate a full engine, this will include rake tasks from
your gem under the `app` namespace. For example if you have a dependency
on `rspec-rails` in your engine's `gemspec`. You will get the task `app:spec`

Closes #8229

Conflicts:

railties/CHANGELOG.md