A way to re-use groups of specs and suites in different contexts.
Shared example groups are defined using "sharedExamplesFor" and then realized in other contexts with "itBehavesLike".
Shared example group: "sharedExamplesFor" and "itBehavesLike" similar…
… to RSpec 2
Thanks for the idea (which we've blogged about and discussed a lot on the list) and the work.
Since this technique can be used without introducing the concept of shared groups to the core code we're not going to pull this - Google groups is failing at the moment, but you can do a search in the mailing list for a how to.