# File lib/fpm/package/freebsd.rb, line 149
  def to_s_fullversion()
    # iteration (PORTREVISION on FreeBSD) shall be appended only(?) if non-zero.
    # https://www.freebsd.org/doc/en/books/porters-handbook/makefile-naming.html
    (iteration and (iteration.to_i > 0)) ?  "#{version}_#{iteration}" : "#{version}"
  end