Elixir - best practices

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Elixir - best practices: add vscode formatter https://hexdocs.pm/elixir/patterns-and-guards.html ex_doc tool (see https://github.com/elixir-lang/ex_doc) static analysis tool called dialyzer (http://erlang.org/doc/man/dialyzer.html) - requires typespecs (https://hexdocs.pm/elixir/typespecs.html)