#680: make the printed lines add up to the total

[morphqdd]

points rounded the sum of the raw values while greeting formatted each line
with %+d, which truncates, so the itemised list and the headline number
disagreed. On the shipped bylaws this happened for a large share of the inputs.

Each line is rounded now, and the total is the sum of those rounded lines, so the
numbers a contributor is shown add up to what they are told they earned.

Closes #680

[yegor256]

Thanks — makes the itemised lines and the total round the same way. Small, focused, tested. CI is green.

@rultor merge

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