rspec/rspec-core — pull request #1361 by myronmarston (2014-03-02 16:06:12+00:00)
Title: Fix nested described class

Make `described_class` to return innermost described class.

It used to return the outermost described class. It doesn't
happen very often that there is more than one class being
described in the set of nested example groups (and we
generally recommend against it), but this was surprising behavior
to me.

Fixes #1114.