Sequence scanner, for finding runs of identical lines (they cause a problem with diff)
Array spec makes sense
Make sure to archive signs when their line has been deleted
Deleting and reinstating items now works for multiple consecutive lines! As long as you only delete one line at a time of course

The code it full of prints and it has semantically incorrect naming all over the place so it needs to be cleaned up later. But I am soooo happy ^___^