refactor

lib/git_stats/git_data/author.rb

@@ -11,6 +11,14 @@ module GitStats
         @commits ||= repo.commits.select { |commit| commit.author == self }
       end
 
+      def insertions
+        short_stats.map(&:insertions).sum
+      end
+
+      def deletions
+        short_stats.map(&:deletions).sum
+      end
+
       def commits_sum_by_date
         sum = 0
         commits.map { |commit|
@@ -20,10 +28,6 @@ module GitStats
       end
 
       [:insertions, :deletions].each do |method|
-        define_method method do
-          short_stats.map { |s| s.send(method)} .sum
-        end
-
         define_method "#{method}_by_date" do
           sum = 0
           commits.map { |commit|