rspec/rspec-rails — pull request #1259 by cupakromer (2014-12-27 21:53:06+00:00)
Title: Update supported RSpec versions.

Rails 4.2.0 has been officially released. Drop usage of the RC line and
use the main releases.

Rails `master` is now targeting Rails 5.x. Plans for Rails 5.x support
with RSpec is not official yet. To prevent the build from failing too
often, drop support for Rails `master` on rspec-rails `master`.