[pt-BR] Update pt/lessons/basics/functions.md to match english counterpart (#1952)
[pt-BR] Update pt/lessons/basics/functions.md to match english counterpart (#1952)

* Update pt/lessons/basics/functions.md to match /en/lessons/basics/functions.md

* Fix typos

nscyclone/elixir-school,nscyclone/elixir-school,doomspork/elixir_school,nscyclone/elixir-school,doomspork/elixir-school,doomspork/elixir_school,doomspork/elixir-school,doomspork/elixir_school,doomspork/elixir-school,nscyclone/elixir-school