/usr/share/mysql/mysql-test/r/mysqldump-compat.result is in mariadb-test-5.5 5.5.36-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 | CREATE DATABASE mysqldump_30126;
USE mysqldump_30126;
CREATE TABLE t1 (c1 int);
DROP DATABASE mysqldump_30126;
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