Using escape sequence within yaml

I'll note that the key to using escape sequences within YAML, is for you to use ' to quote the line, and " inside for the args.

  - debug:
      msg: '{{ ks_iso_volume_id | regex_replace("\s", "\\x20") }}'

From: https://github.com/ansible/ansible/issues/52868#issuecomment-469287200



Note:
Actual error faced:
ERROR! Syntax Error while loading YAML.

  found unknown escape characte