While the `minimum` and `maximum` methods have been available for a long
time for ActiveRecord relations, Rails 7.0 has added these methods for
enumerables as well.
This means that the `start_date` and `end_date` methods in the
ShiftsHelper can use `minimum` and `maximum` no matter whether they
receive an ActiveRecord relation or an array of polls (I think the
latter never happens, though, but I'm not 100% sure).
We were inconsistent on this one. I consider it particularly useful when
a method starts with a `return` statement.
In other cases, we probably shouldn't have a guard rule in the middle of
a method in any case, but that's a different refactoring.
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
