/usr/lib/mysql-testsuite/std_data/bug35469.dat 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 2 3
"1", "string1" "2", "string2" "3", "string3"