Move conditional to a separate method

lib/backup/manager.rb

@@ -110,9 +110,7 @@ module Backup
         elsif backup_file_list.many? && ENV["BACKUP"].nil?
           $progress.puts 'Found more than one backup:'
           # print list of available backups
-          backup_file_list.each do |item|
-            $progress.puts " " + item.gsub("#{FILE_NAME_SUFFIX}", "")
-          end
+          $progress.puts " " + available_timestamps.join("\n ")
           $progress.puts 'Please specify which one you want to restore:'
           $progress.puts 'rake gitlab:backup:restore BACKUP=timestamp_of_backup'
           exit 1
@@ -174,6 +172,10 @@ module Backup
       @backup_file_list ||= Dir.glob("*#{FILE_NAME_SUFFIX}")
     end
 
+    def available_timestamps
+      @backup_file_list.map {|item| item.gsub("#{FILE_NAME_SUFFIX}", "")}
+    end
+
     def connect_to_remote_directory(connection_settings)
       # our settings use string keys, but Fog expects symbols
       connection = ::Fog::Storage.new(connection_settings.symbolize_keys)