refactor(debug): Dedicated function to generate stringified XML repr

update-firewall-source.py

@@ -477,10 +477,8 @@ def write_new_fwd_direct_xml(
         config_obj: configparser.ConfigParser()) -> bool:
     global arg_fw_rule_data
 
-    fwd_direct_xml_str = lxml.etree.tostring(arg_fw_rule_data,
-                                             pretty_print=True,
-                                             encoding="UTF-8",
-                                             xml_declaration=True).decode()
+    fwd_direct_xml_str = get_xml_str_repr()
+
     try:
         with open(config_obj.get(configparser.DEFAULTSECT, "firewalld_direct_abs"), "r+") as fwd_file_handle:
             log.info(f"Writing new firewalld direct config ...")