LP #1088967: [DOC] SQL to create backup user syntax error on v5.1

**Reported in Launchpad by David I last update 22-01-2013 01:00:41

[In:Percona XtraBackup Documentation]

I tried executing the following SQL on MySQL v5.1 and got an error:

CREATE USER 'backup'@'localhost' IDENTIFIED BY 'secret!';
REVOKE ALL PRIVILEGES, GRANT OPTION FROM 'backup';

Error: General error message from server: "Can't revoke all privileges for one or more of the requested users"
SQLState: S1000
ErrorCode: 1269
Error occured in:
REVOKE ALL PRIVILEGES, GRANT OPTION FROM 'backup'