Kill trailing whitespace in ruby files

app/logical/post_sets/pool.rb

@@ -3,26 +3,26 @@ module PostSets
     module ActiveRecordExtension
       attr_accessor :total_pages, :current_page
     end
-    
+
     attr_reader :pool, :page
-    
+
     def initialize(pool, page = 1)
       @pool = pool
       @page = page
     end
-    
+
     def offset
       (current_page - 1) * limit
     end
-    
+
     def limit
       Danbooru.config.posts_per_page
     end
-    
+
     def tag_array
       ["pool:#{pool.id}"]
     end
-    
+
     def posts
       @posts ||= begin
         x = pool.posts(:offset => offset, :limit => limit)
@@ -32,27 +32,27 @@ module PostSets
         x
       end
     end
-    
+
     def tag_string
       tag_array.join("")
     end
-    
+
     def humanized_tag_string
       "pool:#{pool.pretty_name}"
     end
-    
+
     def presenter
       @presenter ||= PostSetPresenters::Pool.new(self)
     end
-    
+
     def total_pages
       (pool.post_count.to_f / limit).ceil
     end
-    
+
     def size
       posts.size
     end
-    
+
     def current_page
       [page.to_i, 1].max
     end