Kill trailing whitespace in ruby files

app/logical/sources/strategies/base.rb

@@ -3,28 +3,28 @@ module Sources
     class Base
       attr_reader :url
       attr_reader :artist_name, :profile_url, :image_url, :tags
-      
+
       def self.url_match?(url)
         false
       end
-      
+
       def initialize(url)
         @url = url
       end
-      
+
       # No remote calls are made until this method is called.
       def get
         raise NotImplementedError
       end
-      
+
       def site_name
         raise NotImplementedError
       end
-      
+
       def unique_id
         artist_name
       end
-      
+
       def artist_record
         if artist_name.present?
           Artist.other_names_match(artist_name)
@@ -32,11 +32,11 @@ module Sources
           nil
         end
       end
-      
+
       def referer_url(template)
         template.params[:ref] || template.params[:url]
       end
-      
+
     protected
       def agent
         raise NotImplementedError