We were very inconsistent regarding these rules.
Personally I prefer no empty lines around blocks, clases, etc... as
recommended by the Ruby style guide [1], and they're the default values
in rubocop, so those are the settings I'm applying.
The exception is the `private` access modifier, since we were leaving
empty lines around it most of the time. That's the default rubocop rule
as well. Personally I don't have a strong preference about this one.
[1] https://rubystyle.guide/#empty-lines-around-bodies
If tests run very fast all votes are created within the last 24
hours, so hot_score has the same value if the creation date for the
votes is Time.current or 1.day.ago.
Creating the votes 48 hours ago we make sure hot_score has the
correct value and the tests pass correctly.
