diff --git a/lib/scholar/metrics/discounted_cumulative_gain.ex b/lib/scholar/metrics/discounted_cumulative_gain.ex
index 9a630e7b..80421e3c 100644
--- a/lib/scholar/metrics/discounted_cumulative_gain.ex
+++ b/lib/scholar/metrics/discounted_cumulative_gain.ex
@@ -1,6 +1,7 @@
 defmodule Scholar.Metrics.DiscountedCumulativeGain do
   @moduledoc """
   Discounted Cumulative Gain (DCG) is a measure of ranking quality.
+
   It is based on the assumption that highly relevant documents appearing lower
   in a search result list should be penalized as the graded relevance value is
   reduced logarithmically proportional to the position of the result.