Starting from 10.1, we have a couple of table options with YES/NO values (as opposed to 0/1) – ENCRYPTED and IETF_QUOTES. According to the documentation, equality sign between the option and the value is optional, and this should work:

CREATE TABLE t1 (i INT NOT NULL DEFAULT 1) ENGINE=CSV IETF_QUOTES NO;

but it doesn't:

MariaDB [test]> CREATE TABLE t1 (i INT NOT NULL DEFAULT 1) ENGINE=CSV IETF_QUOTES NO;

ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'NO' at line 1

It works with = sign.
Same for ENCRYPTED.

For options with 0/1 values both variants work.

Possibly it's a documentation issue.