ref: b7461b63f231d2d45a5309e6ee207276e7c44a98
dir: /testdir/T.chem/
echo T.chem: test chem.awk
awk=${awk-../a.out}
oldawk=${oldawk-awk}
for i in lsd1.p penicil.p res.p
do
$awk -f chem.awk $i >foo1
$oldawk -f chem.awk $i >foo2
diff foo1 foo2 || echo "BAD: T.chem on $i"
done