Kill trailing whitespace in ruby files

lib/danbooru_image_resizer/danbooru_image_resizer.rb

@@ -7,28 +7,28 @@ module Danbooru
       # wider than it is tall
       geometry = "#{Danbooru.config.small_image_width}x#{Danbooru.config.small_image_width}>"
     end
-    
+
     image.change_geometry(geometry) do |new_width, new_height, img|
       img.resize!(new_width, new_height)
       width = new_width
       height = new_height
     end
-    
+
     image = flatten(image, width, height)
-    
+
     image.write(write_path) do
       self.quality = resize_quality
     end
-    
+
     image.destroy!
     FileUtils.chmod(0664, write_path)
   end
-  
+
   def flatten(image, width, height)
     if image.alpha?
       # since jpeg can't represent transparency, we need to create an image list,
       # put a white image on the bottom, then flatten it.
-      
+
       list = Magick::ImageList.new
       list.new_image(width, height) do
         self.background_color = "#FFFFFF"