Fixes test for Gemfile entry changes

Broken by fbe38c9e9d4fe9f82518e8ffc1d757459b0c5f1c
In test we are testing commented gems. 

```
  def test_inclusion_of_a_debugger
    run_generator
    if defined?(JRUBY_VERSION)
      assert_file "Gemfile" do |content|
        assert_no_match(/byebug/, content)
        assert_no_match(/debugger/, content)
      end
    elsif RUBY_VERSION < '2.0.0'
      assert_file "Gemfile", /# gem 'debugger'/
    else
      assert_file "Gemfile", /# gem 'byebug'/
    end
  end
```

Do we want these to enable ?