Gemfile of sample app. Command to run rspec tests doesn't work.

Gemfile

source 'http://rubygems.org'

gem "rails", "~> 3.1.0"
gem 'sqlite3', '1.3.3'

group :development do
gem 'rspec-rails'
end

group :test do
gem 'rspec-rails'
gem 'webrat'
end

# Gems used only for assets and not required
# in production environments by default.
group :assets do
  gem 'sass-rails'
  gem 'coffee-rails'

  gem 'uglifier', '>= 1.0.3'
end

gem 'jquery-rails'

# To use ActiveModel has_secure_password
# gem 'bcrypt-ruby', '~> 3.0.0'

# To use Jbuilder templates for JSON
# gem 'jbuilder'

# Use unicorn as the web server
# gem 'unicorn'

# Deploy with Capistrano
# gem 'capistrano'

# To use debugger
# gem 'ruby-debug19', :require => 'ruby-debug'