We make the code easier to read and at the same time we remove a SQL
injection false positive regarding the use of `WHERE id = #{id}`.
We still get a warning about SQL injection regarding the `tsv =` part.
It's a false positive, since the value of that parameter does not
depend on user input.
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
