remove trailing spaces and blank lines

app/models/answer.rb

@@ -1,6 +1,6 @@
 class Answer < ActiveRecord::Base
   attr_accessible :title
-  
+
   has_many :qanswers
   has_many :questions, through: :qanswers
 

app/models/qanswer.rb

@@ -3,6 +3,6 @@ class Qanswer < ActiveRecord::Base
 
   belongs_to :question
   belongs_to :answer, dependent: :delete
-  
+
   has_and_belongs_to_many :registrations
 end

app/models/question_type.rb

@@ -1,5 +1,5 @@
 class QuestionType < ActiveRecord::Base
   attr_accessible :title, :description
-  
+
   has_many :questions
 end