Kill trailing whitespace in ruby files

app/models/comment_vote.rb

@@ -9,22 +9,22 @@ class CommentVote < ActiveRecord::Base
   validate :validate_user_can_vote
   validate :validate_comment_can_be_down_voted
   validates_inclusion_of :score, :in => [-1, 1], :message => "must be 1 or -1"
-  
+
   def self.prune!
     destroy_all("created_at < ?", 14.days.ago)
   end
-  
+
   def self.search(params)
     q = scoped
     return q if params.blank?
-    
+
     if params[:comment_id]
       q = q.where("comment_id = ?", params[:comment_id].to_i)
     end
-    
+
     q
   end
-  
+
   def validate_user_can_vote
     if !user.can_comment_vote?
       errors.add :base, "You cannot vote on comments"
@@ -33,24 +33,24 @@ class CommentVote < ActiveRecord::Base
       true
     end
   end
-  
+
   def validate_comment_can_be_down_voted
-    if is_negative? && comment.creator.is_janitor? 
+    if is_negative? && comment.creator.is_janitor?
       errors.add :base, "You cannot downvote a janitor comment"
       false
     else
       true
     end
   end
-  
+
   def is_positive?
     score == 1
   end
-  
+
   def is_negative?
     score == -1
   end
-  
+
   def initialize_user
     self.user_id = CurrentUser.user.id
   end