Re: [PATCH 0/4] tests: make more use of 'test_must_be_empty'

[Matthew DeVore]

Note that you can also trivially convert a lot more instances of empty
checking to the "right" way: 'test_line_count = 0'

$ grep -Ir 'test_line_count = 0' t | wc -l
76

I think it would be nice to clean these up as well.