next_migration_number

# File activerecord/lib/active_record/migration.rb, line 490
    def next_migration_number(number)
      if ActiveRecord::Base.timestamped_migrations
        [Time.now.utc.strftime("%Y%m%d%H%M%S"), "%.14d" % number].max
      else
        "%.3d" % number
      end
    end