Thanks for the feedback. That does cuase the example to work, but I've got a couple follow-up questions.

When the encapsulating `pending` failed (as a result of the example no longer raising an error), it generated the following:

``` ruby
  1) RSpec::Its#its in a shared context supports "its" with an implicit subject
     Failure/Error: pending("resolution of the 'extend' problem") do
     NoMethodError:
       undefined method `execution_result' for nil:NilClass
     # ./spec/rspec/its_spec.rb:151:in `block (4 levels) in <module:RSpec>'
```

Does that make sense? Shouldn't is say "FIXED"?  (Note: In the latest commit, I mistakenly had the `it` inside the `pending` rather than the other way around, but I fixed that before running this.)

Second, is it right that the API call to `extend` shouldn't be sufficient (i.e. shouldn't it be doing this `include` as part of that implementation)?