gistfile1.rb

      env :production do
        key 'value'
        foo 'bar'
        sections do
          first 'first_value'
          second 'second_value'
        end
      end

      env :development, :parent => :production do
        bar 'foo'
        foo 'foobar'
        nil_value nil
        false_value false
        sections do
          first 'another_value'
        end
      end