[pt] Fix typos in pt/lessons/basics/testing.md (#1965)
[pt] Fix typos in pt/lessons/basics/testing.md (#1965)


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