Correct whitespace generated by factory template.

[JDutil]

I've updated the factory template to print the whitespace nicer. Most conventions call for a newline at the end of the file, and one of the end's was indented an extra time.

This will generate a template looking like:

# Read about factories at http://github.com/thoughtbot/factory_girl

FactoryGirl.define do
  factory :address do
    street1 "MyString"
  end
end

rather than:

# Read about factories at http://github.com/thoughtbot/factory_girl

FactoryGirl.define do
  factory :address do
    street1 "MyString"
    end
end

[caironoleto]

Please, accepts this pull request