diff --git a/src/about_open_classes.rb b/src/about_open_classes.rb
index bef7eff..80df888 100644
--- a/src/about_open_classes.rb
+++ b/src/about_open_classes.rb
@@ -41,5 +41,5 @@ class AboutOpenClasses < EdgeCase::Koan
   end
 
   # NOTE: To understand why we need the :: before Integer, you need to
-  # become enlightened about scope.  
+  # become enlightened about scope.
 end