rspec/rspec-rails — pull request #1265 by cupakromer (2014-12-30 21:47:46+00:00)
Title: Fix load order issue

Only define `:feature` alias if it's not available. It is possible that Capybara is required before the `FeatureExampleGroup`. It is also possible another gem or a custom `feature` implementation is already available. This does not define our custom alias if `RSpec.feature` already exists.