失敗した後のGemfile

Gemfile

source 'https://rubygems.org'

gem 'rails'

# some gems

group :development, :test do
  gem 'rspec'
  gem 'rspec-rails'
  gem 'pry'
  gem 'pry-rails'
  if RUBY_VERSION >= '2.0.0'
    gem 'pry-byebug'
  else
    gem 'pry-debugger'
  end

  # some gems
end

group :test do
  gem 'poltergeist'
  gem 'launchy'
  gem 'database_cleaner'

  # some gems
end