Log Message:
Update ruby-rspec-core to 2.12.2.

### 2.12.2 / 2012-12-13
[full changelog](http://github.com/rspec/rspec-core/compare/v2.12.1...v2.12.2)

Bug fixes

* Fix `RSpec::Core::RakeTask` so that it is compatible with rake 0.8.7
  on ruby 1.8.7. We had accidentally broke it in the 2.12 release
  (Myron Marston).
* Fix `RSpec::Core::RakeTask` so it is tolerant of the `Rspec` constant
  for backwards compatibility (Patrick Van Stee)

### 2.12.1 / 2012-12-01
[full changelog](http://github.com/rspec/rspec-core/compare/v2.12.0...v2.12.1)

Bug fixes

* Specs are run even if another at\_exit hook calls `exit`. This allows
  Test::Unit and RSpec to run together. (Suraj N. Kurapati)
* Fix full doc string concatenation so that it handles the case of a
  method string (e.g. "#foo") being nested under a context string
  (e.g. "when it is tuesday"), so that we get "when it is tuesday \ 
#foo"
  rather than "when it is tuesday#foo". (Myron Marston)
* Restore public API I unintentionally broke in 2.12.0:
  `RSpec::Core::Formatters::BaseFormatter#format_backtrce(backtrace, example)`
  (Myron Marston).

### 2.12.0 / 2012-11-12
[full changelog](http://github.com/rspec/rspec-core/compare/v2.11.1...2.12.0)

Enhancements

* Add support for custom ordering strategies for groups and examples.
  (Myron Marston)
* JSON Formatter (Alex Chaffee)
* Refactor rake task internals (Sam Phippen)
* Refactor HtmlFormatter (Pete Hodgson)
* Autotest supports a path to Ruby that contains spaces (dsisnero)
* Provide a helpful warning when a shared example group is redefined.
  (Mark Burns).
* `--default_path` can be specified as `--default-line`. `--line_number` can be
  specified as `--line-number`. Hyphens are more idiomatic command line argument
  separators (Sam Phippen).
* A more useful error message is shown when an invalid command line option is
  used (Jordi Polo).
* Add `format_docstrings { |str| }` config option. It can be used to
  apply formatting rules to example group and example docstrings.
  (Alex Tan)
* Add support for an `.rspec-local` options file. This is intended to
  allow individual developers to set options in a git-ignored file that
  override the common project options in `.rspec`. (Sam Phippen)
* Support for mocha 0.13.0. (Andy Lindeman)

Bug fixes

* Remove override of `ExampleGroup#ancestors`. This is a core ruby method that
  RSpec shouldn't override. Instead, define `ExampleGroup#parent_groups`. (Myron
  Marston)
* Limit monkey patching of shared example/context declaration methods
  (`shared_examples_for`, etc.) to just the objects that need it rather than
  every object in the system (Myron Marston).
* Fix Metadata#fetch to support computed values (Sam Goldman).
* Named subject can now be referred to from within subject block in a nested
  group (tomykaira).
* Fix `fail_fast` so that it properly exits when an error occurs in a
  `before(:all) hook` (Bradley Schaefer).
* Make the order spec files are loaded consistent, regardless of the
  order of the files returned by the OS or the order passed at
  the command line (Jo Liss and Sam Phippen).
* Ensure instance variables from `before(:all)` are always exposed
  from `after(:all)`, even if an error occurs in `before(:all)`
  (Sam Phippen).
* `rspec --init` no longer generates an incorrect warning about `--configure`
  being deprecated (Sam Phippen).
* Fix pluralization of `1 seconds` (Odin Dutton)
* Fix ANSICON url (Jarmo Pertman)
* Use dup of Time so reporting isn't clobbered by examples that modify Time
  without properly restoring it. (David Chelimsky)

Deprecations

* `share_as` is no longer needed. `shared_context` and/or
  `RSpec::SharedContext` provide better mechanisms (Sam Phippen).
* Deprecate `RSpec.configuration` with a block (use `RSpec.configure`).

### 2.11.1 / 2012-07-18
[full changelog](http://github.com/rspec/rspec-core/compare/v2.11.0...v2.11.1)

Bug fixes

* Fix the way we autoload RSpec::Matchers so that custom matchers can be
  defined before rspec-core has been configured to definitely use
  rspec-expectations. (Myron Marston)
* Fix typo in --help message printed for -e option. (Jo Liss)
* Fix ruby warnings. (Myron Marston)
* Ignore mock expectation failures when the example has already failed.
  Mock expectation failures have always been ignored in this situation,
  but due to my changes in 27059bf1 it was printing a confusing message.
  (Myron Marston).