Including them might lead to conflicts since two methods might have the
same name. For example, we're getting some exceptions when taking
screenshots of a failing test, because the method `image_path` from
`ActionView::Helpers::AssetUrlHelper` has the same name as a method used
to save the screenshot.
Besides, we were including all helpers in places were only the `dom_id`
method is used, and in other places where no helper methods were used at
all. So we can just invoke `ActionView::RecordIdentifier.dom_id`
directly.
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
The `type: :feature` is automatically detected by RSpec because these
tests are inside the `spec/features` folder. Using `feature` re-adds a
`type: :feature` to these files, which will result in a conflict when we
upgrade to Rails 5.1's system tests.
Because of this change, we also need to change `background` to `before`
or else these tests will fail.
