```ruby
if defined?(RSpec)
  require 'rspec/version'
  if RSpec::Version::STRING >= '2.11.0'
    RSpec.configure do |config|
      config.expect_with :rspec do |c|
        c.syntax = :should
      end
      config.mock_with :rspec do |c|
        c.syntax = :should
      end
    end
  end
  RSPEC_EXAMPLE_GROUP = RSpec::Core::ExampleGroup
else
  RSPEC_EXAMPLE_GROUP = Spec::Example::ExampleGroup
end


```

Fix warning for defining same constant twice when specs
user
```ruby
unless defined?(RSPEC_EXAMPLE_GROUP)
  if defined?(RSpec)
    require 'rspec/version'
    if RSpec::Version::STRING >= '2.11.0'
      RSpec.configure do |config|
        config.expect_with :rspec do |c|
          c.syntax = :should
        end
        config.mock_with :rspec do |c|
          c.syntax = :should
        end
      end
    end
    RSPEC_EXAMPLE_GROUP = RSpec::Core::ExampleGroup
  else
    RSPEC_EXAMPLE_GROUP = Spec::Example::ExampleGroup
  end
end
```
assistant