/usr/lib/mysql-testsuite/r/plugin_load.result 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 | SELECT @@global.example_enum_var = 'e2';
@@global.example_enum_var = 'e2'
1
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