- @for x in *.log; do stem=$${x%.log}; echo $${stem}; ./advent430 <$${stem}.log | ./oldfilter >$${stem}.ochk; done
- @for x in *.log; do stem=$${x%.log}; ./newfilter <$${stem}.chk | diff -ubZ $${stem}.ochk -; done
+ @-for x in *.log; do stem=$${x%.log}; echo $${stem}; ./advent430 <$${stem}.log | ./oldfilter >$${stem}.ochk; done
+ @-(for x in *.log; do stem=$${x%.log}; legend=$$(sed -n '/^## /s///p' <$$x 2>/dev/null || echo "(no description)"); ./newfilter <$${stem}.chk | tapdiffer -w "$${legend}" $${stem}.ochk; done; echo 1..$(words $(shell ls *.log))) | tapview