Explain why more() returns always false in the record picker.

[Carreau]

I think it looks like a mistake to always return false, while it is correct. This is dues to the fact that more() should really be called something like more_with_zero_count().

[codecov]

Codecov Report

Merging #126 (3b0724c) into main (d56b823) will increase coverage by 0.01%.
The diff coverage is 100.00%.

Files Changed	Coverage Δ
src/iterators/recorded.rs	100.00% <100.00%> (ø)

... and 1 file with indirect coverage changes

[jonhoo]

Thanks for taking the time to add this, it's almost certainly going to be helpful to some poor soul (maybe even me) in the future!