diff --git a/lib/mutant/mutator/node.rb b/lib/mutant/mutator/node.rb
index 64a54561..39748541 100644
--- a/lib/mutant/mutator/node.rb
+++ b/lib/mutant/mutator/node.rb
@@ -1,8 +1,10 @@
 # encoding: utf-8
 
 module Mutant
+
   # Generator for mutations
   class Mutator
+
     # Abstract base class for node mutators
     class Node < self
       include AbstractType, NodeHelpers, Unparser::Constants