# File lib/action_view/helpers/asset_tag_helper.rb, line 115
      def image_tag(source, options = {})
        options.symbolize_keys
                
        options[:src] = image_path(source)
        options[:alt] ||= File.basename(options[:src], '.*').split('.').first.capitalize
        
        if options[:size]
          options[:width], options[:height] = options[:size].split("x")
          options.delete :size
        end

        tag("img", options)
      end