diff --git a/lib/mutant/mutator/node/send.rb b/lib/mutant/mutator/node/send.rb
index 729f1d8a..cd2a3a38 100644
--- a/lib/mutant/mutator/node/send.rb
+++ b/lib/mutant/mutator/node/send.rb
@@ -180,7 +180,10 @@ module Mutant
         # @api private
         #
         def emit_implicit_self
-          if receiver.type == :self && !KEYWORDS.include?(selector) && !attribute_assignment? && !OP_ASSIGN.include?(parent_type)
+          if receiver.type == :self &&
+             !KEYWORDS.include?(selector) &&
+             !attribute_assignment? &&
+             !OP_ASSIGN.include?(parent_type)
             emit_receiver(nil)
           end
         end
diff --git a/lib/mutant/mutator/node/send/attribute_assignment.rb b/lib/mutant/mutator/node/send/attribute_assignment.rb
index ad7b85ec..2e891f40 100644
--- a/lib/mutant/mutator/node/send/attribute_assignment.rb
+++ b/lib/mutant/mutator/node/send/attribute_assignment.rb
@@ -49,4 +49,3 @@ module Mutant
     end # Node
   end # Mutator
 end # Mutant
-