fix

app/models/user.rb

@@ -46,21 +46,21 @@ class User < ApplicationRecord
     update_attribute(:activated_at, Time.zone.now)
   end
 
-  # Sends activation email 
+  # Sends activation email
   def send_activation_email
     UserMailer.account_activation(self).deliver_now
   end
 
   private
 
-    # Convaerts email to all lowr_case 
+    # Convaerts email to all lowr_case
     def downcase_email
       self.email = email.downcase
     end
 
-    # Creates and assigns the activation token digest 
+    # Creates and assigns the activation token digest
     def create_activation_digest
       self.activation_token = User.new_token
-      self.activation_digest = User.digest(activation_token)    
+      self.activation_digest = User.digest(activation_token)
     end
 end
\ No newline at end of file