Make diff output clear for test failures

Author: andyw8

test/lib/rails_stats/code_statistics_test.rb

@@ -14,7 +14,7 @@
         RailsStats::CodeStatistics.new(root_directory).to_s
       end
 
-      assert_equal table.delete(" \n"), out.delete(" \n")
+      assert_equal table, out
     end
   end
 end