/usr/lib/mysql-testsuite/include/bug38347.inc is in percona-server-test-5.6 5.6.22-rel71.0-0ubuntu4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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SHOW GRANTS FOR mysqltest_u1@localhost;
--echo
--echo # connection: con1 (mysqltest_u1@mysqltest_db1)
--connect (con1,localhost,mysqltest_u1,,mysqltest_db1)
--connection con1
--echo
SHOW CREATE TABLE t1;
--echo
--echo # connection: default
--connection default
--disconnect con1
--echo
REVOKE ALL PRIVILEGES, GRANT OPTION FROM mysqltest_u1@localhost;
SHOW GRANTS FOR mysqltest_u1@localhost;
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