# File lib/rubygems/installer.rb, line 279
  def write_spec
    rubycode = @spec.to_ruby

    file_name = File.join @gem_home, 'specifications',
                          "#{@spec.full_name}.gemspec"

    file_name.untaint

    File.open(file_name, "w") do |file|
      file.puts rubycode
    end
  end