error in log

[unreturned]

Hello, mysqltuner 1.7.19 reports:

-------- Log file Recommendations ------------------------------------------------------------------
[OK] Log file /var/log/mysql/error.log exists
[--] Log file: /var/log/mysql/error.log(31K)
[OK] Log file /var/log/mysql/error.log is readable.
[OK] Log file /var/log/mysql/error.log is not empty
[OK] Log file /var/log/mysql/error.log is smaller than 32 Mb
[!!] /var/log/mysql/error.log contains 10 warning(s).
[!!] /var/log/mysql/error.log contains 5 error(s).
[--] 5 start(s) detected in /var/log/mysql/error.log
[--] 1) 2020-01-22 12:54:02 1406 [Note] /usr/sbin/mysqld: ready for connections.
[--] 2) 2020-01-22 12:52:19 5201 [Note] /usr/sbin/mysqld: ready for connections.
[--] 3) 2020-01-22 12:50:05 4527 [Note] /usr/sbin/mysqld: ready for connections.
[--] 4) 2020-01-22 12:37:59 1346 [Note] /usr/sbin/mysqld: ready for connections.
[--] 5) 2020-01-22 12:09:16 29395 [Note] /usr/sbin/mysqld: ready for connections.
[--] 5 shutdown(s) detected in /var/log/mysql/error.log
[--] 1) 2020-01-22 12:53:06 5201 [Note] /usr/sbin/mysqld: Shutdown complete
[--] 2) 2020-01-22 12:52:18 4527 [Note] /usr/sbin/mysqld: Shutdown complete
[--] 3) 2020-01-22 12:50:01 1346 [Note] /usr/sbin/mysqld: Shutdown complete
[--] 4) 2020-01-22 12:36:35 29395 [Note] /usr/sbin/mysqld: Shutdown complete
[--] 5) 2020-01-22 12:09:10 1306 [Note] /usr/sbin/mysqld: Shutdown complete

[!!] /var/log/mysql/error.log contains 5 error(s).

But in log i see only:

cat /var/log/mysql/error.log | grep -i err
200122 12:09:15 mysqld_safe Logging to '/var/log/mysql/error.log'.
200122 12:37:58 mysqld_safe Logging to '/var/log/mysql/error.log'.
200122 12:50:01 mysqld_safe Logging to '/var/log/mysql/error.log'.
200122 12:52:18 mysqld_safe Logging to '/var/log/mysql/error.log'.
200122 12:53:59 mysqld_safe Logging to '/var/log/mysql/error.log'.

[unreturned]

Possible fix #473

[unreturned]

Thanks, works!