This file is indexed.

/usr/lib/mysql-testsuite/t/show_check-master.opt is in mysql-testsuite-5.6 5.6.16-1~exp1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

1
--log-output=table,file --slow-query-log --log-queries-not-using-indexes --myisam-recover=""