Note we're excluding a few files:
* Configuration files that weren't generated by us
* Migration files that weren't generated by us
* The Gemfile, since it includes an important comment that must be on
the same line as the gem declaration
* The Budget::Stats class, since the heading statistics are a mess and
having shorter lines would require a lot of refactoring
Otherwise the variants returned for document_type="1" and
document_number="" will be
`["0", "00", "000", "0000", "00000", "000000", "0000000", "00000000"]`
which seems to be useless.
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
Regroup DocumentParser spec. Now they're duplicates in
local_census_specs and census_api_spec.
Move duplicate private method "dni?(document_type) from
LocalCensus and CensusAPI to DocumentParser
