V10/cmd/tbl/compeq

echo $1
/usr/bin/tbl $1 | eqn | troff  -ms >a$$junk
tbl $1 | eqn | troff  -ms >b$$junk
if cmp a$$junk b$$junk; then echo "  OK"; 
else  echo DIFFERENT;  dcan b$$junk; fi
ls -l a$$junk b$$junk
rm a$$junk b$$junk