The _buf field is a string. However, generate_html puts the integer ordinal of a control character into _buf preparing it for _exec_single_character_command. generate_html should put a control character into _buf because _exec_single_character_command is able to call ord itself.
The
_buffield is a string. However,generate_htmlputs the integer ordinal of a control character into_bufpreparing it for_exec_single_character_command.generate_htmlshould put a control character into_bufbecause_exec_single_character_commandis able to callorditself.