The default *mode* is ``0o777`` (octal). On some systems, *mode* is
ignored. Where it is used, the current umask value is first masked out.
- If *exists_ok* is ``False`` (the default), an :exc:`OSError` is raised if
- the target directory already exists. If *exists_ok* is ``True`` an
+ If *exist_ok* is ``False`` (the default), an :exc:`OSError` is raised if
+ the target directory already exists. If *exist_ok* is ``True`` an
:exc:`OSError` is still raised if the umask-masked *mode* is different from
the existing mode, on systems where the mode is used. :exc:`OSError` will
also be raised if the directory creation fails.