replaces spaces with pipes to take into account non-word (\w) characters in key or value.

ec2tags.rb

require 'facter'

if Facter.value("ec2_instance_id") != nil
  instance_id = Facter.value("ec2_instance_id")
  region = Facter.value("ec2_placement_availability_zone")[0..-2]
  tags = Facter::Util::Resolution.exec("ec2dtag  --filter \"resource-id=#{instance_id}\" --region #{region} | cut -f 4-|awk 'BEGIN{FS=\" \";OFS=\"|\"} {$1=$1; print $0}'")
  tags.scan(/(.*)\|+(.*)/) do |key, value|
   fact = "ec2_tag_#{key}"
   Facter.add(fact) { setcode { value } }
  end
end