Added missing newline.

.rubocop.yml

@@ -206,4 +206,4 @@ Style/ExtraSpacing:
 Performance/Casecmp:
   Description: 'Use `casecmp` rather than `downcase ==`.'
   Reference: 'https://github.com/JuanitoFatas/fast-ruby#stringcasecmp-vs-stringdowncase---code'
-  Enabled: false
+  Enabled: false