Kill trailing whitespace in ruby files

app/logical/moderator/ip_addr_search.rb

@@ -1,12 +1,12 @@
 module Moderator
   class IpAddrSearch
     attr_reader :params, :errors
-    
+
     def initialize(params)
       @params = params
       @errors = []
     end
-    
+
     def execute
       if params[:user_id].present?
         search_by_user_id(params[:user_id].split(/,/))
@@ -18,41 +18,41 @@ module Moderator
         []
       end
     end
-    
+
   private
     def select_all_sql(sql, *params)
       ActiveRecord::Base.select_all_sql(sql, *params)
     end
-    
+
     def search_by_ip_addr(ip_addrs)
       sums = Hash.new {|h, k| h[k] = 0}
-    
+
       add_row(sums, "select creator_id as k, count(*) from comments where ip_addr in (?) group by k", ip_addrs)
       add_row(sums, "select updater_id as k, count(*) from post_versions where updater_ip_addr in (?) group by k", ip_addrs)
       add_row(sums, "select updater_id as k, count(*) from note_versions where updater_ip_addr in (?) group by k", ip_addrs)
       add_row(sums, "select updater_id as k, count(*) from pool_versions where updater_ip_addr in (?) group by k", ip_addrs)
       add_row(sums, "select updater_id as k, count(*) from wiki_page_versions where updater_ip_addr in (?) group by k", ip_addrs)
-    
+
       sums
     end
-    
+
     def search_by_user_name(user_names)
       users = User.where("name in (?)", user_names)
       search_by_user_id(users.map(&:id))
     end
-  
+
     def search_by_user_id(user_ids)
       sums = Hash.new {|h, k| h[k] = 0}
-    
+
       add_row(sums, "select ip_addr as k, count(*) from comments where creator_id in (?) group by k", user_ids)
       add_row(sums, "select updater_ip_addr as k, count(*) from post_versions where updater_id in (?) group by k", user_ids)
       add_row(sums, "select updater_ip_addr as k, count(*) from note_versions where updater_id in (?) group by k", user_ids)
       add_row(sums, "select updater_ip_addr as k, count(*) from pool_versions where updater_id in (?) group by k", user_ids)
       add_row(sums, "select updater_ip_addr as k, count(*) from wiki_page_versions where updater_id in (?) group by k", user_ids)
-    
+
       sums
     end
-    
+
     def add_row(sums, sql, ip_addrs)
       select_all_sql(sql, ip_addrs).each do |row|
         sums[row["k"]] += row["count"].to_i