github/ReactiveCocoa — pull request #268 by jspahrsummers (2013-01-07 20:43:35+00:00)
Title: Refactor from-scratch signal operations to build on others instead

Just reducing the amount of code that needs to be maintained and tested.

* Removed unnecessary `RACStream` overrides in `RACSignal`.
* Refactored `-timeout:`, `-finally:`, and `-distinctUntilChanged` in terms of other, more basic, methods.
* Cleaned up `-defer:` a bit.