Write a script that works fine when a blank line is present in the flow of program logic, but breaks or causes unexpected behaviour when that line is removed.
Avoid standard loopholes and stupid answers. Your program should do something "useful," even if all it does is add a few integers.
Removing an empty line from a multiline string doesn't count, unless the expected output from that multiline string shouldn't technically change (ie: if you're removing all blank lines matching
Whitespace foolery isn't allowed either; don't do weird things with carriage returns, tabs, spaces, etc.