Kill trailing whitespace in ruby files

app/models/post_version.rb

@@ -2,38 +2,38 @@ class PostVersion < ActiveRecord::Base
   belongs_to :post
   belongs_to :updater, :class_name => "User"
   before_validation :initialize_updater
-  
+
   module SearchMethods
     def for_user(user_id)
       where("updater_id = ?", user_id)
     end
-    
+
     def updater_name(name)
       where("updater_id = (select _.id from users _ where lower(_.name) = ?)", name.downcase)
     end
-    
+
     def search(params)
       q = scoped
       params = {} if params.blank?
-      
+
       if params[:updater_name].present?
         q = q.updater_name(params[:updater_name])
       end
-      
+
       if params[:updater_id].present?
         q = q.where("updater_id = ?", params[:updater_id].to_i)
       end
-      
+
       if params[:post_id].present?
         q = q.where("post_id = ?", params[:post_id].to_i)
       end
-      
+
       q
     end
   end
-  
+
   extend SearchMethods
-  
+
   def self.create_from_post(post)
     if post.created_at == post.updated_at
       create_from_created_post(post)
@@ -41,20 +41,20 @@ class PostVersion < ActiveRecord::Base
       create_from_updated_post(post)
     end
   end
-  
+
   def initialize_updater
     self.updater_id = CurrentUser.id
     self.updater_ip_addr = CurrentUser.ip_addr
   end
-  
+
   def tag_array
     @tag_array ||= tags.scan(/\S+/)
   end
-  
+
   def presenter
     PostVersionPresenter.new(self)
   end
-  
+
   def reload
     @tag_array = nil
     super
@@ -70,7 +70,7 @@ class PostVersion < ActiveRecord::Base
     end
     return diffs
   end
-  
+
   def diff(version)
     latest_tags = post.tag_array
     new_tags = tag_array
@@ -92,11 +92,11 @@ class PostVersion < ActiveRecord::Base
       :obsolete_removed_tags => old_tags & latest_tags,
     }
   end
-  
+
   def previous
     PostVersion.where("post_id = ? and updated_at < ?", post_id, updated_at).order("updated_at desc").first
   end
-  
+
   def truncated_source
     source.gsub(/^http:\/\//, "").sub(/\/.+/, "")
   end