Update the `logtalk_tester` shell script to print a tag when running unit tests in `optimal` mode
Update the `logtalk_tester` shell script to print a tag when running unit tests in `optimal` mode

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