ACATS B tests

[Richard Kenner]

    In particular, just testing that errors are reported on lines flagged
    ERROR will not work for at least half of the tests, if you bother to
    look at the first B test:

OK, I give up.  Why is that?  Is it because the error was supposed to be
on the *previous* line?

BTW, what is your plan with regard to macro substitutions?  I assume you'll
remove the CE tests that need absolute filenames, right?