parserRaidoMultiAnswer no longer works with '%s*' for ans_array.

[somiaj]

This following problem renders in 2.19 but doesn't render in PG-2.20 with errors.

DOCUMENT();
loadMacros(qw(PGstandard.pl PGML.pl parserRadioMultiAnswer.pl));

Context('Matrix');
$M   = Matrix([[1,0], [0,1]]);
$rma = RadioMultiAnswer([['The identity matrix is %s*.', $M]], 0);

BEGIN_PGML
Enter Identity Matrix.

        [_]{$rma}

END_PGML
ENDDOCUMENT();

Replacing the %s* with %s fixes the issue, but then I don't get the matrix answer array.

[somiaj]

Fixed in #1235