This way it's easier to refactor it and/or change it.
Back in commit c156621a4 I wrote:
> Generally speaking, I'm not a big fan of helpers, but there are
> methods which IMHO qualify as helpers when (...) many Rails helpers,
> like `tag`, follow these principles.
It's time to modify these criteria a little bit. In some situations,
it's great to have a helper method so it can be easily used in view
(like `link_to`). However, from the maintenance point of view, helper
methods are usually messy because extracting methods requires making
sure there isn't another helper method with that name.
So we can use the best part of these worlds and provide a helper so it
can be easily called from the view, but internally make that helper
render a component and enjoy the advantages associated with using an
isolated Ruby class.
This way we generate the same HTML as we generate everywhere where we
manually generate lists of links. Having a blank space betwwen tags
results in a space being introduced when the elements are displayed
inline (or with `inline-block`).
So in places where we don't want that space between the elements we have
to use a flex layout.
This way screen reader users will be notified that the element is the
current one.
I'm not entirely sure whether `aria-current="page"` is more appropriate
than `aria-current="true"`, since it's a general helper which can be
used for any collection of links.
A list of links is a very common pattern in the web, and we use it in
many places. Here we're applying it to one of the most simple ones; the
help page.
Generally speaking, I'm not a big fan of helpers, but there are methods
which IMHO qualify as helpers when:
* They do not deal with application objects but mainly strings and
arrays
* They return text or an HTML tag
* Their logic is simple and splitting it into several methods is not
necessary
Many Rails helpers, like `tag`, follow these principles.
