if advent $$OPTS < $${file}.log >/tmp/regress$$$$ 2>&1; \
then diff --text -u $${file}.chk /tmp/regress$$$$ || exit 1; \
else echo "*** Nonzero return status on $${file}!"; exit 1; fi \
if advent $$OPTS < $${file}.log >/tmp/regress$$$$ 2>&1; \
then diff --text -u $${file}.chk /tmp/regress$$$$ || exit 1; \
else echo "*** Nonzero return status on $${file}!"; exit 1; fi \