Elixir 1.14's new :optional option when deriving Inspect protocol

Elixir 1.14 introduced a new option when deriving the Inspect protocol for a struct.

We already had the :only and :except options.

Elixir 1.14 introduces the :optional option.

It displays the values for those keys only when they differ from their defaults. Not sure when I’d use it (yet), but found it interesting!