program is a rare event: if it's there when we look for it, probably it will be there also a few moments later when we invoke it. For this reason, MBFL proposes a set of func... n.
TESTSTART
If yes: it is equivalent to invoking dotest-set-report-start; if no: it is equivalent to invoking dotest-unset-report-start.
TESTSUCCESS
If yes: it is equivalent to invoking dotest-set-report-success; if no: it is equivalent to invoking dotest-unset-report-success.
Node:Testing C... command, which is 1 for non-letters and null for OK, is held in the variable _LETTERS_ONLY.
A test on
