Add some unit tests for the `logtalk_library_path/2` built-in predicate
Add some unit tests for the `logtalk_library_path/2` built-in predicate

LogtalkDotOrg/logtalk3,LogtalkDotOrg/logtalk3,LogtalkDotOrg/logtalk3,LogtalkDotOrg/logtalk3,LogtalkDotOrg/logtalk3,LogtalkDotOrg/logtalk3,LogtalkDotOrg/logtalk3