Log Message:
Update ruby-rspec-rails to 2.13.2.

### 2.13.2 / 2013-05-18
[full changelog](http://github.com/rspec/rspec-rails/compare/v2.13.1...v2.13.2)

Bug fixes

* `let` definitions may override methods defined in modules brought in via
  `config.include` in controller specs. Fixes regression introduced in 2.13.
  (Andy Lindeman, Jon Rowe)
* Code that checks Rails version numbers is more robust in cases where Rails is
  not fully loaded. (Andy Lindeman)

### 2.13.1 / 2013-04-27
[full changelog](http://github.com/rspec/rspec-rails/compare/v2.13.0...v2.13.1)

Bug fixes

* View specs are no longer generated if no template engine is specified (Kevin
  Glowacz)
* `ActionController::Base.allow_forgery_protection` is set to its original
  value after each example. (Mark Dimas)
* `patch` is supported in routing specs. (Chris Your)
* Routing assertions are supported in controller specs in Rails 4. (Andy
  Lindeman)
* Fix spacing in the install generator template (Taiki ONO)